All Dodge/Jeep/Chrysler Fixes

Vehicle: 2009-2010 (DS) Dodge Ram 1500 pickup

Concern: Tailgate spoiler (the black plastic trim mounted to the top of the tailgate) is coming loose, or is missing.

Cause: Poor design

Resolution: Replace the tailgate spoiler with a revised part.

Details: The new spoiler comes with double-sided tape to improve retention. Most vehicles were repaired under a RRT (Rapid Response Transmittal) at no charge.

Vehicle: 2006-2007 (KJ) Jeep Liberty

Concern: Power window is inoperative. The window falls down. The window can be moved by hand. The window motor still operates, however the window does not move.

Cause: The liftplate (part of the window regulator) is broken.

Resolution: Remove the window regulator and disassemble. Install new liftplate kit to correct.

Details: There are 8 part numbers (2 possibilities for each window). The door panel must be removed to determine which kit is required. At this time (Feb 7, 2011), parts are readily available from dealer parts dept.

Vehicle: 2009-2010 (DS) Dodge Ram 1500 pickup

Concern: Windshield washer nozzle(s) not spraying a proper pattern. Fluid is gushing out.

Cause: Nozzle failure

Resolution: Replace one or both washer nozzles to correct.

Details: First, remove the insulation pad from the underside of the hood. Some of the plastic clips which hold the pad will break. Replace the clips as needed.

Vehicle: 2007-2010 (JK) Jeep Wrangler

Concern: Water leak from the top of the front doors. Water is from rain/carwash.

Cause: The door seal weatherstrips (attached to the doors) were not ideally designed and need to be replaced. Revised parts are available.

Resolution: Replace both door weatherstrips. They are very easy to replace.

Details: The Jeep Wrangler top system (softtop and Freedom Top equipped) is designed to repel normal rain and carwashing only. Do not expect it to seal against high pressure water.

Vehicle: 2006 (KJ) Jeep Liberty

Concern: Battery goes dead overnight. Engine will not crank. Battery has to be charged before engine will start. Or, vehicle must be jump started before engine will start. It appears something is draining the battery while the vehicle is parked.

Cause: A software error in the Body Control Module (BCM) was causing a parasitic drain of approximately 160 milliamps (mA) with the key OFF.

Resolution: Use the dealer scan tool to update the software in the BCM.

Details: Drain with the key OFF should be less than 35 mA.

Vehicle: 2003 (WJ) Jeep Grand Cherokee

Concern: The check engine light (MIL) is on. Scan tool reveals DTC P0601 (PCM internal controller failure.) The DTC cannot be cleared.

Cause: The PCM (engine computer) has an internal fault.

Resolution: Replace the PCM to correct. It is located under the hood, on the passenger side (right side) firewall.

Details: The vehicle is equipped with the factory immobilizer system (SKIM), so the DRB3 scan tool must be used to program the new PCM to the vehicle before it will start and run.

Vehicle: 2007 (JK) Jeep Wrangler

Concern: Customer states the heater is inoperative. Inspected and found the A/C-heat system will not change modes, and found it blows only cold air. It appears the climate control mode and temperature knobs are having no effect on system operation. The fan speed knob is working normally.

Cause: Removed the dash center bezel to inspect. Found both cables were disconnected from the knobs on the A/C control head. Unsure as to why. First time to find this particular problem.

Resolution: Reconnected the cables to the A/C control head and verified correct operation. Reassembled.

Details: -

Vehicle: 2003 (DR) Dodge Ram Truck

Concern: The dash is cracked in several places. The defrost vent trim panel is also cracked and extremely brittle. The truck looks like new and has not been abused. The customer states the dash has cracked due to sun exposure.

Cause: The dash is cracked due to prolonged sun exposure.

Resolution: Detrim the dash. Unbolt the dash structure and tip it back on the seats. Replace the dash top trim cover/pad. Reinstall and retrim the dash. Replace the defrost vent trim panel.

Details: There are alot of screws, but the job is not difficult for an expert like me.

Vehicle: 2005 (CS) Chrysler Pacifica

Concern: No-start. The engine will not crank or start. The battery is OK. The vehicle is a used car from a used car lot. Scan tool reveals immobilzer system (SKIM) DTC "key not programmed."

Cause: The SKIM system had not been programmed for the key that was provided by the customer. The key may have worked if programmed, however it was not the correct key for this model (it has no remote entry buttons on it.)

Resolution: Cut and programmed one new key into the system.

Details: -

Vehicle: 2006 (KJ) Jeep Liberty

Concern: The ESP and ABS warning lights are illuminated on the instrument cluster while driving. Scan tool reveals ABS DTC C123F (steering angle sensor correlation.)

Cause: Test drove and found the steering wheel was way off center while driving straight. Front end parts were slightly bent.

Resolution: Performed alignment to straighten steering wheel. Customer declined replacement of bent parts.

Details: It was necessary to perform the ABS "ECU Initialization" procedure with the StarScan scan tool to reset the system after the alignment.

Vehicle: 2007 (RS) Chrysler Town & Country 2007 (RS) Dodge Caravan

Concern: The rear wiper is totally inoperative. The rear washer works normally. There are no fault codes stored in any module.

Cause: The BCM (body control module) has failed. It will not send power to the rear wiper motor to turn on the motor. All wiring checks out OK.

Resolution: Replace the BCM to correct.

Details: The BCM is located on the firewall inside the vehicle, on the driver side, to the left of the pedals.

Vehicle: 2010 (JC) Dodge Journey

Concern: The left side of the climate control system blows hot air at all times. The right side operates normally.

Cause: The left blend door actuator has failed.

Resolution: Replace the left blend door actuator to correct.

Details: It is located under the dash, roughly above the accelerator pedal. Two screws secure it to the case.

Vehicle: 2008 (JS) Chrysler Sebring, 2.7L engine

Concern: The check engine light (MIL) is on. The MIL flashes at times while driving. The engine idles roughly. Scan tool reveals DTC P0301 (cylinder #1 misfire.)

Cause: Ignition coil for cylinder #1 has failed.

Resolution: Remove the intake plenum and replace cylinder #1 ignition coil.

Details: Cylinder #1 is in the rear bank, closest to the passenger side of the vehicle.

Vehicle: 2007 (DR) Dodge Ram 1500 Truck, 4.7L engine

Concern: The check engine light is on. Scan tool reveals DTC P0524 - Engine Oil Pressure Too Low.

Cause: Software error.

Resolution: Have the dealer reprogram/update the PCM software to correct.

Details: -

Vehicle: 2008 (JS) Chrysler Sebring Convertible

Concern: Water leak near sun visor. Water leaks in when it is raining or when washing car.

Cause: Seal worn/not fully sealing

Resolution: Replace the winshield header/A-pillar weatherstrip seal to correct.

Details: -

Vehicle: 2006 (HB) Dodge Durango

Concern: Memory seat switch on driver door is inoperative. Power seat is operational.

Cause: open circuit

Resolution: Removed door panel to inspect switch and found the memory switch was unplugged.

Details: -

Vehicle: 2002 (DR) Dodge Ram 1500 Truck

Concern: Check engine light is on. Customer may mention that the A/C is not cooling properly. Scan tool will reveal DTC P1491 - Radiator Fan Control Relay Circuit.

Cause: The condenser fan motor has failed.

Resolution: Remove the cover to the underhood fuse box. Inspect fuse #39. If the fuse is open, replace the condenser fan assembly. Then install a new fuse.

Details: The A/C system must be evacuated. The condenser and the fan are removed as an assembly.

Vehicle: 2005-2009 (LX) Dodge Charger, Chrysler 300

Concern: Headliner rattles over bumps; vehicle is equipped with a sunroof.

Cause: Adjustment needed

Resolution: Partially remove the seal that holds the headliner to the sunroof opening. Pull down the headliner slightly and install a sponge foam block to isolate the headliner from the roof structure. Reinstall the seal.

Details: It works!

Vehicle: 2003 (DR) Dodge Truck gasoline

Concern: Fuel gauge is inoperative. The fuel gauge reads empty at all times. The fuel tank is not empty. Scan tool reveals DTC P0461 - Fuel Level Sending Unit No Change Over Miles

Cause: The fuel level sending unit has failed. In this case, the float came off the sending unit.

Resolution: Replace the complete fuel pump assembly to correct. The fuel pump is located in the fuel tank, on top.

Details: 

Vehicle: Jeep Commander (XK)

Concern: Water leak. Rain water (or carwash water) is entering the vehicle. Carpet may be damp or wet.

Cause: Possible water leak from sunroof.

Resolution: Remove the front sill plates and kickpanels. Behind the kickpanels you will find bright blue plastic tubes. These are the sunroof drains. Verify that the drains are inserted in the black rubber grommets in the floor. Next, open the sunroof. Locate the (2) drain holes, (1) in each front corner of the sunroof opening. Pour some water in and see if it drains under the vehicle from the drain tubes. If not, pull the drain tube out of the grommet and check for a blockage. Use compressed air to (gently) blow out the drain tubes.

Details: Wet carpet MUST be lifted up and dried out.

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee

Concern: The key will not turn in the ignition. Unable to start engine because key will not turn. Key will go into ignition but will not turn.

Cause: The ignition lock cylinder is binding.

Resolution: Try this to avoid being stranded: Use a hammer or hammer-like tool to tap the key. You will be tapping the key as if you are trying to drive it further into the ignition. (The key will not actually go in further, we are simply attempting to jar the innards of the lock cylinder so it will turn.) Tap it 3 times and then try to turn it. Retry until successful. Tap harder if neccessary. I can get the key to turn 99% of the time. Be persistent. If the front wheels are turned, try moving the steering wheel slightly left or right while tapping and turning the key.

Details: Replace the ignition lock cylinder to correct this issue.

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee with 4.7L engine

Concern: No start. Intermittent 'no crank' condition. Starter just clicks at times. Battery tests OK, and good clean connections at battery have been verified.

Cause: The starter is the most likely cause. Fault can be very difficult to duplicate.

Resolution: Replace the starter.

Details: It's not as hard as it looks.

Vehicle: (KA) Dodge Nitro

Concern: The inside door handle is broken/loose. The door will not open with the inside door handle.

Cause: The plastic is fractured.

Resolution: Remove the front door panel: Pop out the trim plug from the lower rear corner of door panel and remove T-20 Torx screw. Remove T-20 Torx screw from door pull/armrest. Gently pop out the trim bezel from behind the door handle and remove the 10mm bolt that is now visible. Pry out the window switch assembly and disconnect the wiring. Pull the door panel UP to remove. Remove pin (push it UP) from the inside door handle. Install new door handle.

Details: This only pays 0.3 hour, so it should not take very long.

Vehicle: 2001-2002 RS minivans (Dodge Caravan and Chrysler Town & Country) with 3.3L/3.8L engine

Concern: The MIL (check engine light is) on. The engine is running poorly. Feels like engine is misfiring. Scan tool reveals DTC P0300 multiple cylinder misfire.

Cause: In this case, the ignition coil was faulty. Using the DRB3 scan tool, I could see cylinders 2 and 5 were misfiring under load. Cylinders 2 and 5 share the same ignition coil.

Resolution: Replace the ignition coil pack to correct.

Details: -

Vehicle: 2002-2006 (KJ) Jeep Liberty

Concern: Hissing or air leaking noise from rear of vehicle with engine running.

Cause: Leaking/deteriorated vacuum hose.

Resolution: Inspect and replace the vacuum hose in front of the fuel tank.

Details: The hose is vacuum supply to the leak detection pump. Bulk hose of the correct size will work fine.

Vehicle: 2002-2007 (RS) minivans (Chrysler Town & Country and Dodge Caravan)

Concern: Left or right power window is inoperative. The window is stuck in the 'up' position and will not go down when the switch is pressed.

Cause: The window glass is stuck in the glass run seal.

Resolution: First, test for power/ground to the window motor: turn key on. Turn on the interior lights. Press the switch for the affected window. If the interior lights dim when the power window switch is pressed, you can assume that the window motor is receiving power and ground. This rules out an electrical problem. Now, start the engine. Hold the power window switch in the 'down' position, and slam the affected door. A few slams should jar the window loose and it will go down. Lubricate the entire glass run seal with silicone spray.

Details: If unsuccessful, replace the power window regulator to correct.

Vehicle: 2002-2007 (KJ) Jeep Liberty

Concern: One or more power windows are inoperative. One or more windows are down and will not come up with the switch. Can hear the power window motor running when the switch is pressed. The window is loose and can be moved by hand.

Cause: Power window regulator mechanism failure.

Resolution: Remove the door panel and replace the power window regulator as needed.

Details: For 2006-2007 models, see TSB 23-008-09. Installing a new regulator sometimes requires a new window glass due to changes to the regulator design.

Vehicle: 2002-2007 (RS) Chrysler Town & Country, 2002-2007 (RS) Dodge Caravan (equipped with rear A/C and automatic digital temperature control)

Concern: Rear climate control system blows hot air only. No cool air from rear vents. Scan tool reveals a fault code for the rear blend door.

Cause: Internal fault in the front A/C control head

Resolution: Replaced the front A/C control head to correct.

Details: -

Vehicle: 2009 (JC) Dodge Journey

Concern: Bad smell from A/C system. May smell like mildew or dirty socks.

Cause: The evaporator has mildew/bacteria growing on it.

Resolution: Lower and remove glovebox door. Remove access panel and pull out the cabin air filter. Start engine and turn on A/C blower. Spray the cleaner of your choice (Lysol, disinfectant, odor remover, etc.) into the opening where the cabin air filter goes.

Details: -

Vehicle: 2008 (DR) Dodge Ram Truck

Concern: Audio system speakers are not working correctly. One or more speakers may be inoperative or noisy/rattling. More bass will make the noise worse.

Cause: The most likely cause is failed door speaker(s). There will be DTCs (fault codes) in the audio amplifier, however normally an in-depth diagnosis is uneccessary. The speakers are usually at fault.

Resolution: Replace speakers as needed to correct.

Details: IMPORTANT: To remove door panel, remove fasteners, then lift panel STRAIGHT UP, then pull away from door. Almost all Dodge products have door panels of this type.

Vehicle: 2008 (DR) Dodge Ram Truck

Concern: Winshield wipers inoperative, moving slowly, or will not stop in the normal 'park' position.

Cause: The most likely cause is a failed wiper motor.

Resolution: Replace the wiper motor.

Details: In this particular case, the wiper motor/linkages came as an assembly and was very easy to replace.

Vehicle: (CS) Chrysler Pacifica

Concern: A message is displayed on the dashboard EVIC (electronic vehicle information center) which states "service tire pressure system."

Cause: The most likely cause is one or more failed tire pressure sensors (located inside the tire, integral with valve stem).

Resolution: 1) Check tire pressure in all 5 tires. Set to 36 PSI. Space-saver spare tires should be set to 60 PSI. 2) Verify that all tires have a metal valve stem. (The spare often is NOT equipped with tire pressure sensor). A metal valve stem indicates that a tire pressure sensor is present. 3) Use a DRB3 scan tool to check for fault codes in the overhead console computer. Usually the code will be "tire pressure sensor X (1,2,3, or 4) low battery." 4) Replace the tire pressure sensor(s) as needed.

Details: The challenge is to determine which tire pressure sensor is at fault. The DRB3 will display tire pressure. Adjust tire pressure up or down and test drive to locate failed sensor.

Vehicle: 2005 (WK) Jeep Grand Cherokee with manual A/C system (4 fan speeds)

Concern: The blower fan for A/C and heater is not working correctly. It may be totally inoperative, or one or more fan speeds are inoperative.

Cause: The blower resistor and connector has overheated and partially melted, causing an open electrical circuit.

Resolution: Open glove box and remove glove box door. Inspect the blower resistor and connector and replace as needed.

Details: A repair kit for the wiring to the blower resistor is available from dealer parts department. The wiring must be soldered for an effective repair.

Vehicle: 2005 (WK) Jeep Grand Cherokee

Concern: A/C is not cooling. A/C blows warm or hot air only. An odd smell comes from the dash vents when the blower is first turned on.

Cause: The A/C was not cooling due to low refrigerant due to a leak in the evaporator core. The smell comes from refrigerant oil which has leaked into the HVAC case.

Resolution: Remove dash, remove HVAC case and replace the evaporator core.

Details: -

Vehicle: 1995-2000 (FJ) Chrysler Sebring Hardtop Coupe with 2.5L V6

Concern: Engine cranks but will not start. May have no power to fuel pump.

Cause: Relay failure.

Resolution: Replace 1, 2, or all 3 relays located on upper firewall on driver side.

Details: One relay is for A/C compressor, one is for fuel pump, one is for ASD (automatic shut down). The fuel pump and ASD relays are crucial to engine operation.

Vehicle: 1995-2000 (FJ) Chrysler Sebring Hardtop Coupe with 2.5L V6

Concern: Engine runs poorly on acceleration. Misfire DTCs may be present. Engine probably idles normally. Loss of power on acceleration.

Cause: The ignition coil is failing. It is providing weak spark.

Resolution: Replace the complete distributor assembly.

Details: The ignition coil is located inside the distributor and is not serviced separately. Use a spark tester to verify weak spark.

Vehicle: 2007 (CS) Chrysler Pacifica

Concern: The IPod adapter (dealer installed) is inoperative. Radio operates but IPod will not play when connected.

Cause: Software error/module lockup

Resolution: Disconnect vehicle battery for about 5 minutes. Reconnect battery.

Details: As more and more electronic systems are added to vehicles, sometimes a battery disconnect is all that is required to get things working again. Cheap fix.

Vehicle: 2007 (CS) Chrysler Pacifica

Concern: Poor radio reception. AM has no reception at all. Poor FM reception.

Cause: The radio signal amplifier has failed.

Resolution: Replace the radio signal amplifier, located on the rear roof. The mini-whip antenna screws into it.

Details: Partially lower the rear headliner to access.

Vehicle: 1996-1998 (ZJ) Jeep Grand Cherokee. 1996-? (NS) Chrysler Town & Country, Dodge Caravan

Concern: abs light is on

Cause: pump motor circuit not working properly

Resolution: using scan tool check abs codes-if code pump motor circuit not working properly is found replace abs control module.

Details: note-you will need reverse torx socket to remove abs module. do not remove entire hydraulic control unit as you then have to bleed entire brake system.

Vehicle: 1993-1995 (ZJ) Jeep Grand Cherokee

Concern: How To Program a New Remote

Cause: -

Resolution: Up to 4 remotes can be programmed into receiver at any given time. 1) Locate the receiver...look for a black half-sphere on the rear portion of the overhead console. 2) Sit in driver seat and close door. All doors should be closed. 3) Open driver's door. Leave it open through the programming procedure. 4) Slide mechanical door lock lever to the LOCK position. DO NOT use the switch. 5) Insert ignition key and turn it to RUN position. DO NOT start the engine. Within 20 seconds, aim a remote at receiver dome and press and hold lock button until the power locks cycle. (When receiver accepts programming code the driver's door will unlock.) 6) Once the first remote has been programmed, additional remotes (up to 4) may be programmed into receiver. Within 20 seconds of the previous remote programming, move the mechanical door lock lever to LOCK position. Aim another remote at receiver dome and press LOCK button for at least 5 seconds. The door lock will cycle again. 7) To lock the programmed codes into the receiver, the ignition must be turned off and back on within 20 seconds after programming the last remote's code. At that time, all previous codes are erased from the module.

Details: 93-95 Grand Cherokees require a special remote that uses infared line-of-sight. This is why the remote must be aimed at the receiver dome. They are quite expensive. Check Ebay for better pricing. I have seen (1) case where the receiver was faulty.

Vehicle: 1993-1995 (ZJ) Jeep Grand Cherokee

Concern: The engine will not start due to the factory security system (alarm) has been triggered. The factory security system is honking the horn and the exterior lights (usually the headlights) are flashing. How is the system disarmed so the engine will start?

Cause: There are two ways to disarm the system: 1) Press 'unlock' on the remote keyless entry fob. 2) Use the key in one of the exterior door locks.

Resolution: Put the key in the driver door and turn it back and forth. Keep turning until the security system disarms. If this does not work, try the passenger door and/or the liftgate. More tips: Temporarily disable the horn by removing the horn relay in the underhood fusebox/power distribution center (PDC). The underside of the lid is labeled with relay locations. Disconnect the battery, turn the igniton key 'on', and then reconnect the battery. This works occasionally.

Details: The exterior door lock key cylinders (3) have a disarm switch attached, inside the door. It is common for this switch to fail due to age/humidity/corrosion. Replace these switches as needed. The best solution is to obtain and program a remote keyless entry fob. Drastic solution: Remove the lower access panel inside the glove box. Unplug the security system module. Replace the powertrain control module. Now the security system is permanently disabled.

Vehicle: 1993-1995 (ZJ) Jeep Grand Cherokee

Concern: Turn signals flash too fast. All bulbs appear OK. Could be one or both sides.

Cause: Incorrect bulb type

Resolution: Replace the front turn signal bulb with the correct bulb: 1295NA.

Details: Any other bulb will result in fast-flashing turn signals.

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee (with dual-zone digital A/C)

Concern: Lack of heat from vents. Heater blows cold air. Driver and/or passenger side may be affected. In some cases, fault may be somewhat intermittent.

Cause: The HVAC blend doors are broken. This is a very common problem.

Resolution: To repair, you must pull the dash and the A/C case. For complete repair instructions - I have written a 10 page manual detailing how to repair the blend door problem. Plus, has 30 pages of illustrations. Search eBay for [99-04 Jeep Grand Cherokee Blend Door Heater Core Evap]

Details: Here's how to check fault codes on the digital dual zone ATC system: You can read the fail codes on the system by following this procedure: Turn the ignition switch on and turn on the AC system. You should see a temp display for the two sides. Simultaneously hold down the AC and re-circ buttons while turning the drivers side temp control knob one click to the right. This puts the system into diagnostic mode and you should see a zero for no codes or if there are problems, one or more of the following codes. The higher number code is an historic fail code and the smaller number a current fail code. 15, 47 - Left temperature door not responding 16, 48 - Right temperature door not responding 21, 53 - Left temperature door travel too small 22, 54 - Left temperature door travel too large 23, 55 - Right temperature door travel too small 24, 56 - Right temperature door travel too large 20, 52 - Re-circ door travel too large. 54 and 56 are the most common fail codes and indicate a broken blend door. The system may still be marginally functional, but it will totally break soon.

Vehicle: All (LX) models: 2005-2008 Chrysler 300, 2005-2008 Dodge Charger, Dodge Magnum

Concern: Power steering leak (minor). The power steering hoses are wet. Fluid loss is very minimal in most cases.

Cause: The flexible portions of the power steering pressure hose are seeping fluid.

Resolution: Replace the power steering pressure hose to correct.

Details: The hose goes from the power steering pump to the rack & pinion.

Vehicle: 2009 (JC) Dodge Journey

Concern: Front power windows are inoperative. Power locks are inoperative. Scan tool module scan reveals no communication from the left front door control module. All other modules are communicating. All other modules have logged a no communication DTC against the driver door module.

Cause: Left front door control module has failed.

Resolution: Check the module power, ground, and bus communication wires. If OK, replace the module.

Details: The left front door control module is attached to the left front door with 2 screws. Remove the door panel to access. Many times, a battery disconnect will get the module working again, though it may be temporary. It was unsuccessful in this case.

Vehicle: 2001 (AN) Dodge Dakota pickup with 3.9L V6

Concern: The MIL (check engine light) is on. Scan tool reveals DTC P0601 Powertrain Control Module (PCM) Internal Controller Failure.

Cause: The PCM has detected an internal fault.

Resolution: The only solution is to replace the PCM. The engine will usually run normally and there will be no driveability issue or other related problems.

Details: The PCM is very easy to replace on this model. It is located under the hood, on the passenger side fender, next to the air filter box. The PCM does not need to be programmed for the engine to run. However, a scan tool should be used to program the VIN and odometer into the new PCM.

Vehicle: 2004 (LH) Chrysler 300M front wheel drive 3.5L (had 150,000 miles)

Concern: Engine will not idle properly. Have to press accelerator to keep engine running. Engine stalls due to idle problem. Engine runs normally otherwise. No check engine light. Related symptom: The engine cranking speed was a bit low.

Cause: The IAC (Idle Air Control) valve was failing. It was able to influence the idle speed but not control it very well.

Resolution: Replacing the IAC valve totally resolved the problem. Initially I figured the slow cranking speed was related. The battery was original(!) and failed according to the battery tester with about 200 CCA of a 600 CCA rating. Replacing the battery got the cranking speed up to normal, but actually made the idle problem worse due to the engine computer memory loss when the battery was disconnected.

Details: On some vehicles, low cranking speed due to a bad battery causes idle problems. Not in this case. The IAC valve is located on the passenger side of the throttle body, under the throttle position sensor. The throttle body is at the rear of the intake plenum on 3.5L.

Vehicle: 2008 (JS) Chrysler Sebring

Concern: Cig lighter/power outlet is inoperative.

Cause: Fuse open

Resolution: Check fuses 11 and 16 in the fuse box underhood.

Details: The fuse numbers are on the lid of the fusebox. The fuse box is actally a control module called the TIPM (Totally Integrated Power Module).

Vehicle: This case was a 2005 (KJ) Jeep Liberty.

Concern: Both headlamps are inoperative. Will not turn on. High beams are OK. Low beam headlights will not illuminate.

Cause: Both headlamp bulbs are faulty.

Resolution: Replace both headlamp bulbs.

Details: The customer had the Jeep in our shop two days previous for some engine work. Surely the headlight problem must be related to the work we did, right? Something must be disconnected. No, it's called a coincidence. Both headlamp bulbs had broken filaments.

Vehicle: 2001-2007 (RS) Dodge Caravan minivans with digital automatic A/C system.

Concern: The A/C blower runs at full speed (high) at all times when the key is on. The A/C blower is speed will not adjust with the fan speed knob.

Cause: The blower control resistor has failed.

Resolution: Replace the blower control resistor.

Details: Remove glove box door to access.

Vehicle: 2001-2007 (RS) Chrysler Town & Country minivans with digital automatic A/C system.

Concern: The A/C blower runs at full speed (high) at all times when the key is on. The A/C blower is speed will not adjust with the fan speed knob.

Cause: The blower control resistor has failed.

Resolution: Replace the blower control resistor.

Details: Remove glove box door to access.

Vehicle: (KJ) Jeep Liberty

Concern: Lack of airflow from A/C vents. Blower is OK. Air is coming from the vents but seems like not enough volume.

Cause: The air inlet screen is obstructed by dust build-up.

Resolution: Operate the blower on high with the fresh air setting (NOT on recirculate). Is the air volume OK? Press the recirc button to turn recirc ON. Is the air volume less? If there is less airflow on recirc, remove the glove box door. Examine the screen on the air inlet for dust build-up. If present, use a hook tool to remove the screen. It is not necessary.

Details: No other models have a screen.

Vehicle: (KJ) Jeep Liberty

Concern: A/C inoperative at times. Blower is OK, but sometimes A/C blows warm air. Intermittent.

Cause: Open circuit in low pressure switch -or- A/C compressor clutch is failing.

Resolution: Ensure that the A/C system has sufficient charge to allow operation. In other words, make sure the refrigerant is not empty. Disconnect the connector to the A/C low pressure switch located on the drier near the firewall. Use a jumper wire to connect the 2 pins inside the connector. If the clutch engages and the A/C blows cold, replace the low pressure switch. It is not necessary to evacuate the refrigerant to replace the switch. Otherwise, check the wiring to the A/C clutch for power with a test light. If power is present, but the A/C clutch is not engaged, carefully tap the clutch with a hammer handle and see if it engages. If it does, the clutch is faulty and should be replaced. Or simply replace the entire A/C compressor.

Details: Perform both tests with the engine running and A/C system on.

Vehicle: 2007 (KA) Dodge Nitro

Concern: The MIL (check engine light) is on. Scan tool reveals DTC P0456 small leak detected.

Cause: A leak in the evaporative emissions system.

Resolution: Check the vapor line just forward of the fuel tank. In this case, I found the line was loose, not fully engaged. It appeared OK at first glance. An air test with the evap smoke/air test machine confirmed that a leak was present. A smoke test revealed the source. Fully connect the vapor line to correct.

Details: The lines are snap-together (quick-connect) type. No tools required.

Vehicle: 1993-1998 (ZJ) Jeep Grand Cherokee with 4.0L engine.

Concern: Chirping noise from engine. Can hear noise at idle with hood up. Seems to be coming from the distributor.

Cause: The distributor bushings are failing.

Resolution: Replace the complete distributor to correct. Recommend dealer part.

Details: There is a very specific procedure to install the distributor.

Vehicle: 1993-1998 (ZJ) Jeep Grand Cherokee

Concern: The passenger side front carpet is wet. The water produced by the A/C system (condensate) is leaking under the carpet.

Cause: Poor design. The drain tube is located inside the right frame rail and is not accessible.

Resolution: For complete repair instructions search ebay for: [How 2 Fix A/C Water Leaking 93-98 Jeep Grand Cherokee] for a complete wrtie-up!

Details: I have developed an innovative solution to this problem. Much easier than pulling the dash and A/C case.

Vehicle: 2006 (TJ) Jeep Wrangler

Concern: The MIL is on. Scan tool reveals DTC P0301 cylinder 1 misfire and P0300 multiple cylinder misfire. The engine seems to be running normally. Found a related symptom later: after vehicle sits for a few hours, it has a long crank time.

Cause: The fuel pump had an internal leak. The fuel pressure was dropping to -0- after the engine was shut off.

Resolution: Test fuel pressure and replace the in-tank fuel pump assembly.

Details: The leak was allowing air to enter the fuel line, which caused a cold-start misfire. This is a perfect example of why it is important to "analyze the symptoms" and "look at the big picture." In this case, the customer did not complain about the extended crank time, but it turned out to be a contributing factor.

Vehicle: Chrysler (PT) PT Cruiser.

Concern: The MIL (check engine light) is on. Scan tool reveals DTC P0551 power steering switch performance. Driveability is normal. No other symptoms.

Cause: The power steering pressure switch has failed.

Resolution: Replace the power steering pressure switch and top off the power steering fluid.

Details: The switch is located on the rack and pinion (steering gear). Access from under the vehicle. Most likely the switch is leaking. Clean out the two-wire connector with electrical parts cleaner or brake cleaner. (3) test drives should clear the MIL.

Vehicle: 2008 (JS) Chrysler Sebring

Concern: Speed control (cruise control) is inoperative. On/Off switch seems to be OK, but will not set.

Cause: The speed control switch is faulty.

Resolution: Replace the speed control switch to correct.

Details: New switch is a revised part.

Vehicle: Chrysler (PT) PT Cruiser

Concern: Front windshield washers are inoperative. Can hear the pump running, but no spray.

Cause: The washer nozzles are broken. The hoses have broken off the nozzles. The nozzles became very brittle over time due to engine heat.

Resolution: Replace both washer nozzles and clean out/repair the hose conections as needed.

Details: Cool fact: PT Cruisers have only one washer pump which supplies both the front and rear washers. A polarity-reversing system is used. When the pump turns in one direction, the front sprays. In the other direction, the rear sprays.

Vehicle: 2005 (LX) Chrysler 300 with 2.7L engine.

Concern: The MIL (check engine light) is on. Scan tool reveals DTC P0340 camshaft position sensor circuit and/or P0344 camshaft sensor intermittent. Related symptom: the engine may have an extended crank time (hard to start).

Cause: Software error and failed camshaft position sensor.

Resolution: 1) Flash program (update) the PCM (engine computer). 2) Replace the camshaft position sensor.

Details: The camshaft position sensor is very easy to replace. It is on the front of the engine.

Vehicle: 2001-2007 (RS) Chrysler Town & Country Minivan

Concern: The MIL (check engine light) is on. Scan tool reveals DTC P0455 large leak detected, P0442 medium leak detected, P0456 small leak detected. May have one, two, or all of these DTCs.

Cause: Evaporative system has a leak.

Resolution: Check for the most common leaks first: 1) The hoses going to the charcoal canister (under vehicle, near fuel tank) 2) The hoses next to the air filter box, to the purge solenoid. Remove the entire air filter box to get a good look. Examine carefully for split/cracked hoses. Replace as needed. 3) The purge solenoid is a common problem. It sometimes will have an internal leak. 4) Always consider the gas cap. Make sure it is tight.

Details: If no obvious problems are found, an EVAP smoke/air machine may be needed to diagnose.

Vehicle: 1999-2002 (WJ) Jeep Grand Cherokee

Concern: Vehicle pulls to left or right. Brakes seem to stay applied. Front brakes getting too hot. Burning smell from front brakes. Usually happens after front brake job.

Cause: Front caliper(s) failure. Caliper(s) are sticking.

Resolution: There are two styles of front caliper. Look at the rear calipers. See the thick wire on the outboard side? (It is a type of spring for caliper retention). Check to see if the front calipers have the same type of spring (it will be larger, but same basic shape). If the front calipers have the spring, they are the old style and need to be replaced with new style calipers. The old style have a tendency to stick after a brake job.

Details: There is a repair package available which includes 2 new calipers, front pads, and sealing washers for the brake lines. Check your local dealer. New-style calipers do not have the wire spring.

Vehicle: 2005-up (WK) Jeep Grand Cerokee, 2005-up (LX) 300, 300C, Charger, etc. and others

Concern: Airbag light is on. Passenger 'airbag off' light may be on.

Cause: The passenger seat is out of calibration.

Resolution: Have your dealer calibrate the passenger seat.

Details: The passenger seat has a weight sensing system.

Vehicle: 2001-2007 (RS) Chrysler Town & Country 2001-2007 Dodge Caravan (with power sliding doors)

Concern: Power sliding door stops operating. The door will open about 12 inches and stop. The door will close most of the way and stop. Door works normally when opened or closed manually.

Cause: Open circuit in the wiring that goes from the body to the door. Usually the ground wire is broken. The wiring harness looks like a motorcycle chain but is plastic.

Resolution: Replace the wiring harness from body to door to correct.

Details: When the chain bends at a certain point, the ground wire opens. Easy to replace.

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee.

Concern: Vibration while braking. Pulsation is felt in brake pedal and/or steering wheel.

Cause: Brake rotors are warped. Very common problem.

Resolution: Resurface or replace the front brake rotors. Inspect the brake pads.

Details: Normally brake pulsations are caused by the front rotors, which are more likely to warp. Of course, the rear rotors can warp also in some cases. Rear warpage will probably not be felt in the steering wheel.

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee

Concern: Speakers sound terrible. Distorted.

Cause: One or both dash speakers are coming apart. The paper is rattling against the speaker frame.

Resolution: Replace the dash speaker(s) to correct.

Details: -

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee

Concern: Snapping sound when opening driver or passenger front door.

Cause: Door check strap is worn.

Resolution: Replace the door check strap to correct.

Details: Requires door panel removal.

Vehicle: 2007 (JK) Jeep Wrangler

Concern: The interior lights will not turn on using the collar switch on the left multifunction stalk. The interior lights do come on when a door is opened. Related symptom: the instrument cluster backlighting is not dimmable using the collar switch on the left stalk. When the headlamps are on, the backlighting is at full brightness and cannot be adjusted.

Cause: The left stalk multifunction switch is defective.

Resolution: Replace the left stalk multifunction switch to correct.

Details: -

Vehicle: 2007 (JK) Jeep Wrangler

Concern: Front wipers operate but will not stop in the 'park' position. In other words, the wipers will stop in any position on the windshield when the wiper switch is turned off. Related symptom: wipers operate on low speed when the switch is in the 'intermittent' position.

Cause: The park switch inside the wiper motor is faulty.

Resolution: Replace the front wiper motor to correct.

Details: -

Vehicle: 2007 (JK) Jeep Wrangler

Concern: Speed control (cruise control) is inoperative.

Cause: Speed control switch (small stalk on steering wheel, right side) is faulty.

Resolution: Replace the speed control switch to correct.

Details: -

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee

Concern: The passenger front carpet is wet. A/C condensate (water from A/C operation) is leaking inside the vehicle.

Cause: A/C condensate (water from A/C operation) is leaking inside the vehicle.

Resolution: Locate the A/C drain tube. It is located on the passenger side lower firewall, in the engine compartment. You will see a black plastic tube sticking out about 1.5 inches long. It is easy to see with 4.0L engine. With 4.7L engine, you will have to access it from below. Purchase a rubber drain tube #56000724 from dealership parts dept. Install the tube onto the exiting drain tube and clamp it with a tie strap. (The rubber drain tube should point down). Start the engine and turn the A/C to full cold/high fan. A small amount of cool air should flow from the drain tube. After a few minutes, water will begin to drip from the drain tube.

Details: This will solve your problem for about $5.00. Wet carpet needs to be lifted up and dried out. The padding under the carpet will NEVER dry out on its own. Failure to dry it out properly will result in odor, rusted body and wiring damage.

Vehicle: This particular case was a 2003 (RS) Chrysler Town & Country minivan with 3.8L engine. Appplies to most vehicles also.

Concern: MIL (check engine light) is on. Engine runs poorly. Engine is misfiring. Power loss. Scan tool reveals DTC P0203 (fuel injector #3 control circuit) and DTC P0204 (fuel injector #4 control circuit).

Cause: Wiring to fuel injectors was damaged: wires were bare and shorting out aginst each other.

Resolution: Repair wiring and replace the PCM (engine computer).

Details: There is a 10-pin connector near the ignition coil pack that connects the engine wiring main harness to the fuel injector harness. Examine the wiring carefully: remove the conduit around the wiring to check. Removing the wiper module will improve access. The short circuit was sending battery voltage back to the PCM which fried the injector drivers inside the PCM.

Vehicle: 1993-1998 (ZJ) Jeep Grand Cherokee with 5.2L engine.

Concern: Oil leak from rear of engine. Makes a mess in the driveway where Jeep is parked.

Cause: The engine rear main seal is leaking.

Resolution: Here's a quick 'fix' that worked for me: Purchase two of those foil baking pans, size approximately 10" long, 5" wide, 4" deep. Put one pan inside the other, to make it double-strength. Fill pan about half way with kitty litter. Use black plastic tie straps to secure the pan to the trans cooler lines that run directly under where the oil is leaking.

Details: The rear main seal is rather difficult to replace on 5.2L. If it is a slow leak, it may not be worth the effort/expense to repair. The catch-pan worked perfectly for me---no more mess in the driveway! Pan will have to be checked/cleaned out periodically.

Vehicle: This particular vehicle was my 1995 (ZJ) Jeep Grand Cherokee, but this applies to any vehicle with a fabric headliner.

Concern: Headliner fabric is falling down. Looks terrible.

Cause: Age/poor design

Resolution: Here's how to fix this cheaply and with no special tools or equipment: Remove complete headliner from vehicle. Pull the fabric off. Clean the fuzzy stuff from the panel. I used compressed air to blow it off. Obtain (1) gallon of flat black (or whatever color you prefer) latex paint and a thick nap roller. Paint the headliner and allow it to dry for a day or two. Reinstall headliner.

Details: My headliner looked so much better after painting it. Cost me about $25.00.

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee with full time 4 wheel drive.

Concern: Noise while turning sharply in parking lot. Rubbing noise/sensation.

Cause: Low fluid, or incorrect fluid in the transfer case.

Resolution: Drain and refill the transfer case. Inspect for leaks.

Details: I have seen several cases where the fluid was extremely low with no significant leak present, indicating a lack of maintenance. A special fluid is required for full time 4WD tranfer cases. Part time units usually require ATF (automatic transmission fluid.)

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee with AZC (automatic zone control).

Concern: Interior fan for A/C and heater is inoperative. May be intermittent.

Cause: The electrical connector to the blower control module (AKA blower resistor) has overheated and burned.

Resolution: Replace the blower resistor and splice on a new connector. See dealer for parts.

Details: -

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee

Concern: Rattle noise from front suspension, over bumps.

Cause: Front shocks are loose due to worn bushings.

Resolution: Replace the front shocks.

Details: Check the upper shock bushings for lateral movement.

Vehicle: (CS) Chrysler Pacifica

Concern: Noises from front suspension. Clicking, popping and rubbing noises.

Cause: Re-torque needed

Resolution: Two things to check on Pacifica: (1) Tighten the lower control arm bolts (at the body). (2) Tighten both CV axle nuts at the front hubs.

Details: -

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee

Concern: Oil pressure gauge is inaccurate. Gauge reads 80 psi (or needle is all the way to the right if it has L - H scale) when engine is running.

Cause: The oil pressure sensor is failing.

Resolution: Replace the oil pressure sensor.

Details: Requires a special tool.

Vehicle: Most Chrysler/Jeep/Dodge vehicles, 2005 and newer (WK) (XK) (LX) (PT)

Concern: The clock (on the radio) is incorrect. What is the procedure to set the clock?

Cause: -

Resolution: 1) Hold the 'time' button until the clock hours digits blink. 2) Turn the right radio knob to set the hour. 3) Press the right radio knob in to select minutes. 4) Turn the right radio knob to set minutes.

Details: Easy Squeezy Lemon Peazy!

Vehicle: All (CS) Chrysler Pacificas and (RS) minivans (without electronic throttle).

Concern: Gas pedal is 'sticking', feels like it is 'popping' or hard to press.

Cause: Carbon build-up in the throttle body is causing the throttle blade to stick.

Resolution: Clean the throttle body with carb spray and an old toothbrush.

Details: -

Vehicle: All (CS) Chrysler Pacificas.

Concern: Thumping sound or sensation on acceleration from a stop.

Cause: Front and/or rear powertrain mounts are broken.

Resolution: Replace the powertrain mounts to correct.

Details: Common problem. Mounts are undersized for engine torque capability.

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee (with manual HVAC system)

Concern: HVAC air comes out of defrost vents only.

Cause: Loss of vacuum supply to HVAC system.

Resolution: Repair or replace the vacuum hose as needed.

Details: Inspect the vacuum hoses to the intake manifold (4.0L engine). It is common for the HVAC vacuum supply hose to soften and come off the manifold.

Vehicle: All late model Chrysler, Jeep, and Dodge vehicles (PT) (LX) (WK) (XK)

Concern: No start. The engine does not crank or start. When key is turned to the 'start' position, nothing happens. Battery is NOT dead.

Cause: The immobilizer module is electrically 'locked up' or is otherwise non-responsive.

Resolution: Disconnect the battery for a few minutes, then reconnect the battery and retest. If the engine now will start, the immobilizer module may need to be replaced.

Details: The immobilizer module is located very close to where the key goes into the ignition lock cylinder. The immobilizer module has several names, depending on year/model: SKIM, SKREEM, WIN. Vehicles with a WIN also have a FOBIK type remote (no key).

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee

Concern: Power window inoperative. The window is down and will not go up. Can hear the window motor operating.

Cause: The window regulator cable is broken.

Resolution: Replace the power window regulator to correct.

Details: The new regulators from the dealer are heavily revised. I have never seen one of the new style regulators break. I have installed lower-cost aftermarket regulators that worked just fine. Replace the door panel plastic clips as needed.

Vehicle: 1993-1998 (ZJ) Jeep Grand Cherokee

Concern: Possible no start and/or check engine light. One or more blown fuses in power distribution center underhood.

Cause: Wiring is shorted to ground.

Resolution: Repair wiring as needed.

Details: Two places to inspect: (1) Check the downstream (rear) oxygen sensor: I have seen many cases where the wiring comes out of it's retainer and rubs on the driveshaft. (2) Inspect the wiring running down near the front of the intake manifold and close to the power steering pump (4.0L only). It is easy for this to be misrouted when the exhaust manifold is replaced. The wiring goes to the upstream (front) oxygen sensor. The wiring will melt and short out on the exhaust manifold if misrouted.

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee with 4.0L engine

Concern: Possible no start and/or check engine light. One or more blown fuses in power distribution center underhood.

Cause: Wiring harness at rear of engine is shorted to ground.

Resolution: Inspect and repair wires as needed. Armor the harness to prevent future problem. A piece of heater hose makes an excellent gaurd for the harness.

Details: Inspect the harness at the rear of the valve cover. The harness will rub on the cylinder head bolt.

Vehicle: 1993-1998 (ZJ) Jeep Grand Cherokee

Concern: One or more power door locks are inoperative. Power locks make 'whirling' type noise.

Cause: The power lock actuator is failing. The lock actuator is inside the door latch. The door latch is the part that physically latches the door closed. It is on the rear of the door.

Resolution: Replace the latch to correct.

Details: -

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee

Concern: One or more power door locks are inoperative. Power locks make loud 'screeching' noise.

Cause: The power lock actuator is failing. The lock actuator is inside the door latch. The door latch is the part that physically latches the door closed. It is on the rear of the door.

Resolution: Replace the latch to correct.

Details: -

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee

Concern: Ongoing problem with brake bulbs. One or both brake bulbs is inoperative or too dim. New bulb does not solve problem, or seems to be only a temporary fix.

Cause: The 'circuit board' that holds the bulb sockets is warped or burned, causing high resistance.

Resolution: Replace the complete taillamp assembly. These are available aftermarket for a very reasonable price.

Details: Bad design. Substitute a 3157 LED bulb to prevent this from happening again. Check ebay for the bulbs. The heat from a conventional 3157 bulb causes the circuit board to warp.

Vehicle: All vehicles equipped with electronic stability control (WK) (XK) (LX)

Concern: ABS/ESP/BAS light is on.

Cause: First thing to check for is an alignment problem. Test drive the vehicle and check if the steering wheel is straight when the vehicle is going straight.

Resolution: If steering wheel is turned left or right while driving straight, the vehicle needs an alignment. Perform an alignment then test drive. The warning light should turn off.

Details: The stability control computer measures steering angle and degrees per second of steering wheel rotation. When it sees steering angle greater than or less than -0-, but the yaw sensor is not sensing a turn, a rationality fault is set and the ABS/ESP/BAS light will be on.

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee

Concern: The A/C blows but is not cold (compressor will not engage). The instrument cluster backlighting is on at all times (with key on). The instrument cluster gauges are inoperative. Power windows are inoperative.

Cause: An electrical fault is disrupting the PCI Data Bus. The various modules cannot communicate with each other.

Resolution: This is not easy to resolve, however I will give you a few tips. Use a digital volt meter to measure the voltage on pin #2 of the data link connector. The data link connector is located under the driver side dash near the fuse box. It is the connector that the scan tool plugs into. Pin 2 is the PCI Bus circuit and should be a white/violet wire. The voltage with key on should be between 0 and about 2.5 volts. It will fluctuate as the modules communicate. If the voltage is too high, say 6 or more volts, you have found the cause. Unplug modules one at a time until the voltage drops and things start working again.

Details: Module examples are: PCM (engine computer), TCM (transmission computer), BCM (body computer), ABS (antilock brake module), instrument cluster, air bag computer, driver door module, passenger door module, radio, amplifier, a/c control head, overhead console computer. Sometimes disconnecting the battery for a few minutes will resolve a module-based PCI bus issue, though it may be temporary. It is also possible for the PCI bus circuit to be shorted to voltage or ground. Usually it is a module problem rather than wiring.

Vehicle: Most vehicles, especially with 2.7L engine (LX) (JR)

Concern: The MIL (check engine light) is on. Scan tool reveals DTC P1281 cooling system performance and/or P0128 thermostat rationality.

Cause: Low coolant. Coolant bottle has not been topped off at normal service intervals.

Resolution: Top off the cooling system with the correct type of coolant. Most late model vehicles require orange coolant. Do not mix coolant types, except in an emergency. Verify that there are no coolant leaks. It is common for the black plastic coolant housing (top front of engine) to leak. Coolant housing has one or two hose connections, coolant temp sensor and bleeder screw.

Details: (3) warm-up cycles will clear the MIL.

Vehicle: 1995-2000 (FJ) Chrysler Sebring Hardtop Coupe with 2.5L V6

Concern: Engine runs poorly. Have to press accelerator to start engine. Engine tries to stall.

Cause: The EGR valve is stuck open.

Resolution: Replace the EGR valve.

Details: To test: with engine idling, locate the EGR metal tube on the upper rear of the intake manifold. Barely touch it with your finger. If it is very hot and slightly burns your finger, the EGR valve is stuck open.

Vehicle: 1993-1998 (ZJ) Jeep Grand Cherokee

Concern: DTC P0351 Ignition Coil Primary Circuit. Engine stalls at times.

Cause: PCM (engine computer) failure. The ignition coil driver inside the the PCM is failing.

Resolution: Replace the PCM.

Details: -

Vehicle: All vehicles (ZJ) (LX) (XJ) (RS)

Concern: No start. Engine cranks but does not start. Most likely the engine died while driving. The fuel gauge shows 1/8 of a tank.

Cause: The fuel tank is totally empty. The fuel level sending unit is failing.

Resolution: Replace the fuel level sending unit, or the entire fuel pump assembly. Add fuel.

Details: Always start with the basics.

Vehicle: In this case the vehicle was a 2000 (NS) Chrysler Town & Country Minivan. Also applies to most vehicles.

Concern: A/C blows warm air at times.

Cause: Coolant leak from radiator was causing the engine to overheat. The PCM (engine computer) monitors engine temperature and disables the A/C compressor when coolant temperature rises above a predetermined level.

Resolution: Replaced the radiator and refilled cooling system.

Details: This is a perfect example of 'looking at the big picture.' Diagnosis should begin with a general, common-sense visual inspection of the vehicle. If I had focused on the A/C system alone, the diagnosis would have taken much longer.

Vehicle: Jeep Wrangler (TJ) with 4.0L engine

Concern: Loss of power. Engine feels like it is producing only about 50% of normal power. Engine runs smoothly and idles normally.

Cause: Insulation pad (attached to underside of hood) was drooping down and covering the air inlet to the air filter. Reduced airflow to engine caused the power loss.

Resolution: Remove part of the the hood insulation pad closest to the air filter box.

Details: This was a very interesting case. Another dealership had been working unsuccessfully on this vehicle. They had replaced many parts, including the whole engine! Most Wranglers are not equipped with a hood insulation pad, however, this particular vehicle was.

Vehicle: All Chrysler (PT) PT Cruiser with 2.4L TURBO engine only.

Concern: Vehicle does not have enough/normal power. Engine runs smooth but not enough power. Possible 'ching-a-ling' type noise from rear of engine. Probably no check engine light.

Cause: The turbocharger has failed.

Resolution: Replace the turbocharger assembly. (Get out your checkbook on this one.) Also replace the oil supply line to the turbo.

Details: On neglected vehicles, oil sludge will build up in the oil supply line to the turbo. This will prevent oil from reaching the turbo, which causes turbo failure. Use a quality synthetic engine oil in all vehicles that are equipped with a turbocharger and change the oil at reasonable intervals.

Vehicle: All Chrysler (PT) PT Cruiser with 2.4L gas engine. Usually happens around 100,000 miles.

Concern: No start. Engine cranks but will not start. The engine probably died while driving. Engine sounds odd while cranking (sounds too smooth). This assumes the battery and starter are OK.

Cause: The timing belt is broken. Partially remove (pull back) the upper timing belt cover and have an assistant crank the engine. If the cam sprockets do not turn, the timing belt is broken. You may see the shredded remains of the timing belt.

Resolution: Replace the timing belt. Also replace the water pump, timing belt tensioner, and both idler pulleys to complete the repair.

Details: This is a fairly difficult job.

Vehicle: 1993-2004 (ZJ) (WJ) Jeep Grand Cherokee with 4.0L engine

Concern: Check engine light (MIL) is on. Has P1281 engine is cold too long. No driveability symptoms. Engine is running normally.

Cause: The thermostat is stuck open. The thermostat in many cases may come out in several pieces (falling apart).

Resolution: Replace the thermostat and gasket and refill the cooling system.

Details: The PCM (engine computer) performs a rationality test on the engine cooling system. It measures engine temperature vs. engine run time. If the engine warms up too slowly, P1281 will be set and the MIL will be on.

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee.

Concern: Engine is overheating, mostly at stoplights. Engine does not overheat while driving. A/C will not be very cold at stoplights. This assumes the coolant is full.

Cause: The electric radiator fan is inoperative.

Resolution: Replace the electric radiator fan AND the radiator fan relay to correct. Trust me...been there, done that. If one is faulty, replace both.

Details: The radiator fan relay is a solid-state (no moving parts) electronic relay. It is located directly under the right (passenger side) headlamp. You will need to cut an access hole in the plastic support panel under the headlamp to access the relay.

Vehicle: All vehicles with 3.7L and 4.7L engines. (WJ) (KJ) (DR) (AN) Jeep Liberty, Grand Cherokee, etc.

Concern: Engine is overheating after cooling system repairs. Engine is overheating after the radiator was drained/refilled for maintenance.

Cause: The cooling system was not properly bled. There is an air pocket trapped, not allowing coolant to circulate.

Resolution: Allow the engine to cool. Remove the bleeder screw. Look where the upper radiator hose attaches to the engine for the bleeder screw. It requires a 10mm hex (Allen) type tool. Sometimes the screw will be very tight. You will need to use a high quality tool and possibly considerable force to remove it. Remove the radiator cap and fill the cooling system until coolant comes out of the bleeder screw hole. Reinstall the bleeder screw. You must use thread sealant to prevent a leak. Put the radiator cap on and retest.

Details: If the bleeder screw will not come out, remove the upper radiator hose at the engine just enough for coolant to come out while filling the system. This will work in a pinch.

Vehicle: Jeep Liberty (KJ) with 3.7L 2002-2006

Concern: Cooling system will not build pressure. Upper radiator hose is always soft, even when engine is at normal operating temperature. Coolant reservior appears to be overfilled when engine is hot.

Cause: The radiator cap has failed and is not holding pressure.

Resolution: Replace the radiator cap, located on the coolant reservior which is mounted on the firewall.

Details: Typically there will be no coolant leak. The system pressure is built up by the air pocket above the coolant level in the reservior.

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee

Concern: Long crank time. Engine is hard to start. May require 2 or 3 attempts to start engine. Engine will always start. Not to be confused with a true no-start condition. This assumes the battery is OK and the cranking speed is normal.

Cause: An o-ring seal inside the fuel pump has deteriorated and is leaking. This is an INTERNAL leak. No fuel will leak outside the vehicle.

Resolution: Lower the fuel tank and replace the fuel pump assembly.

Details: This would be a good time to replace the fuel filter also.

Vehicle: All Chrysler/Jeep/Dodge (WJ) (AN) vehicles with 4.7L 8 cyl engine.

Concern: Idle fluctuation. Engine idle speed goes up and down. May be intermittent. Idle speed will rise to about 1200 rpm and settle back to normal. More noticeable in park or neutral.

Cause: The TPS (throttle position sensor) is beginning to fail. The closed throttle voltage reading is not accurate/fluctuates.

Resolution: Replace the TPS located on the throttle body.

Details: -

Vehicle: Jeep Wrangler (TJ) approx 1997-2002

Concern: The check engine light is on. Scan tool shows a fault code for the TPS (throttle position sensor) circuit. The fault is always present and is not able to be cleared. Typical repair methods have been unsuccessful (you can't fix it).

Cause: If the clockspring ribbon shorts out in a certain way, due to the circuit complexities inside the PCM, the PCM sees this condition as a TPS circuit fault. This was likely an unforseen circumstance during the engineering phase.

Resolution: Stop whatever you are doing. Hopefully you have not replaced very many expensive parts yet. Remove the two steering column covers and disconnect the connectors going to the clockspring. Retest for the TPS fault.

Details: -

Vehicle: Jeep Grand Cherokee (WJ) with 4.7L engine. Dodge products with 4.7L engine.

Concern: The check engine light is on. Has any or all of the following DTCs: P0201 injector#1 control circuit, P0202 injector #2 control circuit, P0203, P0204, P0205, P0206, P0207, P0208. Fault is probably intermittent, and there is possibly no driveability problem associated with it.

Cause: A fault in the TPS (throttle position sensor) causes signal noise, which the PCM interprets as an injector circuit fault. This condition is very rare.

Resolution: Replace the TPS to correct the condition.

Details: -

Vehicle: Engines with cast iron block, mostly happens on 3.7L such as in (KJ) Jeep Liberty and Dodge products.

Concern: Diagnosis has revealed that the CKP (crankshaft position) sensor needs to be replaced. Problem: The CKP sensor cannot be removed due to the engine block is rusty. The sensor will not come out of the hole. After considerable effort, now the sensor is broken and part of it remains in the engine block.

Cause: Exposure to road salt has rusted the engine block, causing the CKP hole to become smaller.

Resolution: Light blowtorch. Burn the remains of the CKP out of the hole. The cast iron can withstand the heat. Don't worry if the CKP magnet falls inside the engine; it will be quite happy in there. Use sandpaper or a hone to clean up the CKP hole. Lube the new CKP o-ring with engine oil proir to installation.

Details: Tech Tip: On 3.7L and 4.7L engines, replace both the CKP (crankshaft position) sensor and the CMP (camshaft position) sensor at the same time. Use MOPAR parts from the dealer. Every tech has been 'burned' on this one, just replace both and be done with it.

Vehicle: Applies to all vehicles. In this case it was a 2008 (JS) Chrysler Sebring with 2.7L engine. The basic factory warranty was still in effect.

Concern: Check engine light is on. Scan tool revealed DTC P0301 (cylinder 1 misfire). Related symptom: Technician noted the engine had a slightly rough idle, but ran OK otherwise.

Cause: Vehicle was driven through high water. The engine ingested just enough water to slightly bend cylinder #1 connecting rod. This caused the compression ratio to be reduced on cyl 1, causing a power imbalance, resulting in a rough idle and a misfire DTC.

Resolution: Remove cylinder head and oil pan and replace cyl 1 piston/rod assembly.

Details: This was yet another case where the customer withheld information. They knew the vehicle has been driven through high water, but chose to not disclose this information, perhaps hoping that the factory warranty would cover the repair. Water ingestion/flood damage is not covered by the factory warranty.

Vehicle: Jeep Liberty (KJ) 2002-2005 (approx)

Concern: Right (or left) side tail/brake bulb keeps burning out. Customer has had bulb replaced numerous times.

Cause: A loose reflector piece inside the tailight lens is touching the bulb. Shake the tailight to check for rattle noise.

Resolution: Replace both tailight assemblies with revised parts to correct.

Details: Design flaw

Vehicle: All Chrysler/Jeep/Dodge (LH) (CS) (PT) vehicles equipped with NVLD (natural vacuum leak detection) system.

Concern: The check engine light is on. Scan tool reveals code (DTC) P0440 general evaporative system failure.

Cause: Usually caused by a failure of the switch inside the NVLD assembly.

Resolution: Replace the NVLD assembly to correct.

Details: The purpose of the NVLD system is to test the integrity of the fuel vapor containment system. For example, if the fuel filler cap was not in place, or there was a leak in the fuel tank/vapor lines/canister, the NLVD system would identify the fault and the PCM will illuminate the check engine light. This system is mandated by the EPA, to prevent evaporative emissions. All recent vehicles have this system in one form or another. Evaporative emissions are caused when gasoline evaporates into the atmosphere, which is a form of pollution. This also explains why the nozzles at gas stations have changed over the years---to prevent evaporative emissions. The NVLD system does not test the integrity of the pressurized fuel lines or fuel injectors. Note: P0440 indicates a general fault with the NVLD system. It does not neccessarily mean that there is a leak.

Vehicle: Applies to almost all vehicles, common on Chrysler (PT) PT Cruiser with 2.4L engine.

Concern: Check engine light is on. Fault code P0340 (no cam signal at PCM). Engine may hesitate.

Cause: Camshaft position (CMP) sensor failure.

Resolution: Replace the camshaft position sensor to correct. I recommend to use a Mopar part from the dealer for best results.

Details: P0340 means that the PCM (Powertrain Control Module)(engine computer) is recording a loss of the signal generated by the camshaft position sensor. This sensor is located on the left side of the cylinder head (nearest to the air filter box).

Vehicle: 2008 (RT) Dodge Caravan and Chrysler Town & Country with power sliding doors

Concern: Power sliding doors will not close at times; they close partially, then reverse to the full open position. Condition may be intermittent.

Cause: Software error.

Resolution: Have the dealer reprogram (flash) both power sliding door modules. If the modules are already at the latest software version, or the flash does not correct the problem, further diagnosis may be required.

Details: -

Vehicle: The following vehicles with a console-mounted shifter: 2005 and newer (LX) body (Chrysler 300/300C, Dodge Charger, Dodge Magnum) 2007 (JS) and newer Chrysler Sebring and Dodge Avenger

Concern: Shifter will not come out of Park. Vehicle cannot move because shifter is stuck in Park. Vehicle operator has engine running and brake pedal IS depressed (normal operation).

Cause: Shifter internal mechanical failure.

Resolution: There is a manual override button on the rear of the shifter. It is bright pink in color. You will need to remove a trim piece or cupholder insert to access the override button. Key should be on, depress and hold brake pedal, and press and hold pink override lever. At the same time, pull the shifter toward you, out of park. It may require 2 hands and considerable force. Part of the internal shifter will break/snap and then you will be able to move the shifter to reverse, drive, etc. If you are successful, this will save you a tow bill. Replace the gearshift assembly to repair permanently.

Details: -

Vehicle: 2007 (JK) Jeep Wrangler

Concern: Intermittent no start. Better description is NO CRANK. A clicking noise may be heard. Engine will later crank and start. Condition is intermittent.

Cause: Insufficient ground.

Resolution: Add a 10 gauge black wire from battery negative terminal to the engine. A good/easy place to connect it is the top alternator mounting bolt.

Details: -

Vehicle: All vehicles (TJ) (WJ) (RS) (XK) (WK) (RS)

Concern: Loud noise/vibration from interior fan (for A/C heat)(HVAC) especially when on high speed, usually speed 3 or 4.

Cause: HVAC fan (blower motor) is out of balance. Usually caused by fan sucking in leaves or other debris.

Resolution: Remove the blower motor and inspect/clean the fan blade (squirrel cage type). Normally the blower motor is located under the passenger side dash. Most are easy to remove, held in with 3 screws, either Phillps or T20 torx.

Details: -

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee

Concern: Power windows inoperative. Possibly all switches on driver door inoperative. Interior lights may not come on when driver door is opened.

Cause: Driver door module (master switch assembly) is not communicating.

Resolution: First, disconnect the battery for 10 minutes, then reconnect and retest for normal operation. This may 'unlock' the driver door module. If unsuccessful, inspect the wiring going from the driver door to the body. Carefully loosen the black rubber boot and pull back. You will probably find (1) or more broken wires. Replace the door wiring harness, or repair the wires.

Details: -

Vehicle: 2005 (approx) (RS) Chrysler Corp. minivans (Chrysler Town & Country and Dodge Caravan)

Concern: Power locks are inoperative. Power locks do not operate from the switches on the door panels. Power locks do not operate from remote fob.

Cause: Software error in BCM (body control module)

Resolution: Disconnect the battery for about 10 minutes, then reconnect and retest for power lock operation. If the power locks are now functional, have your dealer service dept reprogram/update (flash program) the BCM.

Details: -

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee

Concern: All 4 power windows inoperative.

Cause: The BCM (body control module) is electrically "locked up".

Resolution: Disconnect the battery for about 10 minutes. Reconnect and retest for proper operation. This should reset the BCM.

Details: Diagnosis with a scan tool should be the first step in a case such as this. A module scan with a DRBIII scan tool would have indicated that all modules were functional except the BCM. If disconnecting the battery does not resolve the issue, further diagnosis will be necessary.

Vehicle: 1993-1998 (ZJ) Jeep Grand Cherokee with 4.0L engine, 1999-2004 (WJ) Jeep Grand Cherokee with 4.0L engine, 1997-2001 (XJ) Jeep Cherokee with 4.0L engine, 1997-2006 (TJ) Wrangler with 4.0L engine.

Concern: Engine cranks but will not start. May have died while driving. Related symptoms: Fuel gauge shows 'empty', however the fuel tank is not empty. Volt gauge is all the way to the left (low), but the battery is not discharged.

Cause: The CKP (crankshaft position) sensor is shorted internally. Turn the key off. Unplug the CKP sensor and retest for proper gauge operation.

Resolution: Replace the CKP sensor to correct.

Details: Scan tool will show 'no response' to PCM (engine computer). This is why the fuel gauge and volt gauge are inoperative. The PCM is not functioning, so the fuel and voltage data is not bussed to the instrument cluster. When the the CKP sensor shorts internally, the PCM will not function. The connector is located on the right side of the engine, near the rear of the engine block. The CKP sensor is located on the left side all the way in the back. Usually it must be replaced from under the vehicle. This is a fairly common problem.

Vehicle: 2006 (PT) Chrysler PT Cruiser Also applies to all 2001-2007 PT Cruisers

Concern: A/C blows warm air when vehicle speed is 0mph (i.e., at a stoplight). A/C blows cold while the vehicle is moving 30mph or above. Related symptom: the engine speed will fluctuate at idle with the A/C on, due to excessive high-side pressure in the A/C system.

Cause: 

Resolution: replace the electric radiator fan assembly.

Details: electric radiator fan failure. The low speed circuit in the fan is inoperative. The high speed circuit is most likely still functional which is why the engine does not overheat.

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee

Concern: One or both exterior mirrors are floppy and loose. Will not stay in position.

Cause: The folding hinge has broken.

Resolution: Remove mirror. Drill 2 holes. Install trim screws to lock the mirror in position. Reinstall mirror.

Details: Cheaper than replacing!

Vehicle: 2004-2006 (CS) Chrysler Pacifica

Concern: Various electrical problems. Possible check engine light. Flickering lights, etc.

Cause: High resistance where wiring attaches to positive battery cable at battery.

Resolution: To test: Start engine. Turn on lights, A/C, radio, rear defrost. Monitor the temperature of the positive battery terminal. If it gets very hot (compare it to the negative battery terminal), you have found the problem. Install a new universal battery terminal to correct. Retest.

Details: I have seen this problem about 6 times. Use a digital voltmeter to check for voltage drop from wiring to terminal.

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee

Concern: Coolant loss/have to add coolant periodically. Related symptom: Odd smell from A/C dash vents. Passenger side carpet may be wet/moist.

Cause: The heater core is leaking.

Resolution: Replace the heater core. Alternative/temporary repair: Locate the 2 heater hoses going to the firewall underhood. Cut the hoses and splice them together. Hose splices are available at any auto parts store. Vehicle will have no heat, but A/C will still operate.

Details: Heater core is leaking. Inspect the HVAC black plastic case in the passenger side footwell for evidence of leak. Coolant will run down the case and under the carpet. Leak is usually slow/minor.

Vehicle: This particular case was a 2005 (LX) Chrysler 300C RWD with 5.7L Hemi engine.

Concern: Customer's complaint was "engine has too much power." I road tested and found actually the power came on too suddenly. The slightest press of the accelerator pedal would cause the car to jump forward.

Cause: The MAP (manifold absolute pressure) sensor was not reading correctly. There were no fault codes.

Resolution: Replaced the MAP sensor to correct. There was a revised part available.

Details: The MAP sensor is extremely crucial to correct engine operation, especially on engines equipped with electronic throttle control.

Vehicle: 1993-1995 (ZJ) Jeep Grand Cherokee with automatic A/C (digital display)

Concern: Interior fan for A/C and heater operates on 'high' only. Cannot control fan speed with the knob.

Cause: The blower control resistor has failed.

Resolution: Replace the blower control resistor.

Details: It is located under the passenger side dash.

Vehicle: 2005 (LX) Chrysler 300

Concern: Instrument panel gauges are inoperative at times. The ESP/BAS warning light is on. DTC B2107 may be active.

Cause: The ignition switch is failing.

Resolution: Replace the ignition switch (electrical portion) to correct.

Details: Revised part was available.

Vehicle: 2005 (LX) Chrysler 300, also all vehicles equipped with integral key/remote

Concern: The keyless entry remote (integral with igniton key) is inoperative. The power locks operate normally from the switches on the front doors.

Cause: Internal remote failure, usually a soldered connection

Resolution: Best resolution is to replace the key.

Details: Key will need to be programmed in order to function. Engine will not start and remote will not operate until the key is programmed to the vehicle with the appropriate scan tool.

Vehicle: 2005-2009 (LX) Chrysler 300, Dodge Charger, Dodge Magnum with 3.5L engine

Concern: Belt noise. Belt moves slightly laterally with engine running.

Cause: Normal wear.

Resolution: Replace the drive belt, tensioner, and idler pulley as needed.

Details: Subject vehicle had 80,000 miles.

Vehicle: 2005-2009 (LX) Chrysler 300, Dodge Charger, Dodge Magnum

Concern: Oil leak from rear differential.

Cause: Axle seals worn.

Resolution: Replace both axle seals in the differential.

Details: At least top off the fluid with 75W-140 synthetic gear oil. A 14mm hex tool is required to remove the fill plug, which is located on the driver side of the differential. It wil be quite tight. Use sealer to seal the threads of the fill plug when reinstalling.

Vehicle: 2006 (JR) Chrysler Sebring sedan and convertible

Concern: Horn blows without pressing horn pad on steering wheel. Can happen while car is unattended, or while driving.

Cause: Faulty horn switch.

Resolution: Replace the driver airbag to correct.

Details: The horn switch is integral with the driver airbag.

Vehicle: 2002-2007 (KJ) Jeep Liberty

Concern: Blower for A/C and heat works on HIGH setting only. Speeds 1,2,3 are inoperative.

Cause: Failed blower resistor.

Resolution: Remove glove box door and replace the blower resistor.

Details: The connector will be difficult to remove. Pull the red locking tab toward you with a hook-type tool. Unplug connector. The blower resistor is retained by (2) screws. A 5/16" socket will be needed, and a wiggler/universal joint helps.

Vehicle: 2000 (AN) Dodge Dakota pickup

Concern: Driver power window inoperative. The window fell down into the door.

Cause: The window regulator has broken.

Resolution: Remove door trim panel and replace the power window regulator. In this case, the window lift plate had come off. I was able to use 2-part epoxy to bond it to the glass.

Details: New-design regulator requires drilling 2 holes for the motor mounting bolts. To remove door panel: (1) screw top front near mirror, (1) screw at rear bottom of panel, (1) T-25 torx near inside door pull, and (1) T-25 Torx hidden behind inside door handle (pull handle to reveal). Once fasteners are removed, lift door panel UP to remove. Disconnect rod and wiring.

Vehicle: 2000 (AN) Dodge Dakota pickup

Concern: Left rear power window inoperative. Window is up and will not go down. Also, the left rear power door lock is inoperative. A 'screeching' noise is heard when the power lock switch or remote button is used.

Cause: Two problems, same door. Related? No. The window motor is locked up, and the door lock actuator has failed.

Resolution: Replace the power window regulator. Replace the door latch.

Details: The power lock actuator is inside the door latch.

Vehicle: 2000 (AN) Dodge Dakota pickup with 4.7L V8

Concern: Idle speed fluctuates. Idle speed is erratic.

Cause: The throttle position sensor is failing.

Resolution: Replace the throttle position sensor.

Details: Located on the throttle body. T-25 torx is needed. Use dealer (Mopar) part.

Vehicle: This case was a 2006 (XK) Jeep Commander. Applies to most vehicles equipped with Electronic Stability Program (ESP).

Concern: ABS/ESP warning lights come on while driving. Test drove to verify concern, found also that it felt like the brakes were applying slightly at times.

Cause: The right rear tire had been replaced recently. It was a slightly different size than the other 3 tires.

Resolution: All 4 tires need to be exactly the same size, especially when the vehicle is equipped with ESP.

Details: The ABS computer constantly monitors wheel speed. An oddball tire will spin at a slightly different speed, which the ABS computer interprets as slippage, causing the ESP to intervene. In this case, the ABS was applying the brakes in an attempt to match wheel speeds. The bottom line: all ESP/ABS diagnostics should begin with an inspection of the tires for correct sizing and wear.

Vehicle: 2008 Chrysler (LX) 300C

Concern: Transmission would not shift out of first gear. ABS, ESP, BAS warning lights illuminated on instrument cluster.

Cause: The ABS computer had failed.

Resolution: On this particular vehicle, it was necessary to replace the ICU (integrated control unit) located next to the washer fluid bottle underhood. The ICU is the ABS computer and the HCU (hydraulic control unit). The parts were not available separately in this case.

Details: The ABS computer connector was tested for power, ground, and Can Bus signals. Wheel speed signals go directly to the ABS computer and this information is bussed to the PCM (engine/transmission computer). The loss of wheel speed signals to the PCM caused the transmission to not shift. This vehicle was a flood car that the customer purchased at an auction.

Vehicle: 2007 (JK) Jeep Wrangler 3.8L engine

Concern: Engine is overheating. Engine runs too hot. The engine temperature gauge reads higher than normal. The A/C is not as cold as it should be. The coolant is full and the electric cooling fan is operating. The A/C system has sufficient charge to operate.

Cause: Found the vehicle had been used off-road, based on dirt build-up under the vehicle. A fine-grained dirt/dust had clogged the fins of the radiator and condenser. The reduced airflow through the radiator and condenser caused the symptoms.

Resolution: Remove electric radiator fan and carefully clean the radiator and condenser with a garden hose.

Details: The dirt build-up in the fins was not obvious. Had to shine a flashlight through to see blockage.

Vehicle: 2006 (CS) Chrysler Pacifica

Concern: The MIL (check engine light) is on. Scan tool reveals DTC P0455 large leak detected.

Cause: Found the fuel filler cap was totally loose. (Not reinstalled correctly after last fill-up.)

Resolution: Tighten the fuel filler cap.

Details: (3) options to turn off the MIL: 1- Clear the codes by disconnecting the battery. 2- Run the evap test (3) times with scan tool. (3 good trips will clear the MIL) 3- Sinply operate the vehicle normally. The MIL will turn off after a few days.

Vehicle: 2006 (LX) 300, Charger, Magnum

Concern: The A/C system blows hot air. Air from vents will not get cold. Interior fan blows, but air is hot. The A/C refrigerant level is sufficient. The A/C compressor clutch will not apply/engage. Scan tool reveals active DTC P0645-A/C CONTROL CIRCUIT/OPEN.

Cause: Open circuit between PCM and A/C compressor clutch relay. The wire is LB/OR (light blue with an orange stripe) and goes from PCM C3 (natural color) pin 11 to the front PDC fusebox C1 green connector pin 5. The PCM grounds this circuit to turn on the A/C compressor clutch relay.

Resolution: Found the wire was broken at the front PDC fusebox C1 green connector pin 5. The connector was corroded (unknown why) and the wire was broken off. I was able to depin the terminal, install a new terminal and splice the wire, which restored A/C compressor clutch operation.

Details: -

Vehicle: 2004 (DR) Full-size Pickup

Concern: Lack of volume from A/C vents. Blower is noisy, especially on high speed.

Cause: The recirculation door is broken. It is partially blocking the blower inlet. A piece of the door is stuck in the blower wheel, causing imbalance and noise.

Resolution: Remove blower motor located under passenger side dash. It has 3 screws and 1 electrical connector. Inspect with a flashlight and reach up inside and retrieve the broken recirc door. It will come out if you get the angle right. Remove any debris from the blower wheel. Reinstall the blower and retest. This should solve the problem. The system will be on recirculate at all times now. To fully repair, pull the dash back and replace the recirculation door housing assembly.

Details: Pulling the dash is quite easy on this model.

Vehicle: 1993-1998 (ZJ) Jeep Grand Cherokee

Concern: Power lock issues. One or more power locks are inoperative. A 'whirling' noise is coming from the doors, but the power lock may or may not operate.

Cause: The power lock motor (located inside the door latch) is failing.

Resolution: Replace the door latches as needed to correct.

Details: There have been a few cases where I had to replace all 4 door latches.

Vehicle: Older vehicles: minivan, Dodge Dynasty, Chrysler New Yorker, etc. equipped with Bendix 10 ABS brakes.

Concern: ABS light and brake light comes on every time the brake pedal is pressed.

Cause: The ABS accumulator has failed. It is the large black round appendage located next to the brake fluid reservior.

Resolution: Disconnect battery. Press brake pedal 40 times to depressurize the accumulator. Use a large pair of channel-lock pliers to unscrew the accumulator. Install new accumulator and retest.

Details: Check brake fluid level by first pressing the brake pedal 40 times with the key off. Otherwise the fluid will be overfilled. Other common problems are: ABS pump/motor, dual function pressure switch, pump motor relay. Note: some parts of Bendix 10 are covered by a lifetime warranty. The accumulator is not covered.

Vehicle: 2006 (KJ) Jeep Liberty

Concern: Hesitation on acceleration. Very difficult to duplicate the condition. Momentary power loss on acceleration, only at certain speeds/loads.

Cause: Found the left front tire was a slightly different size than the other 3 tires. The left front tire had been replaced due to a blowout. The tire shop installed the wrong size tire.

Resolution: Replace the tire with the correct size.

Details: The ABS computer was seeing the left front wheel rotating at a slighlty different speed than the other 3 wheels. This is interpreted as tire slippage, causing the ABS to activate the ESP (electronic stability program) which can reduce engine power and/or apply individual wheel brakes in an attempt to match wheel speeds.

Vehicle: All vehicles equipped with express-up front windows. (LX) Chrysler 300, (LX) Dodge Charger, (LX) Dodge Magnum, (XK) Jeep Commander, (WK) Jeep Grand Cherokee

Concern: Power widow issue. Express up (auto up), (one-touch up) feature is inoperative. Usually auto-down works OK. Problem may have started after the battery was disconnected, replaced, or the vehicle was jump-started due to a dead battery.

Cause: The windows have lost calibration due to low battery voltage.

Resolution: Calibrate the windows with the following procedure: Sit in driver seat and close door. Start engine. Use the switch to run the window down and hold switch all the way down for about (8) seconds. Run the window up and hold switch all the way up for about (8) seconds. Test window for correct express-up operation. Repeat procedure for other window.

Details: If windows try to express-up and then reverse and go back down, repairs may be needed. If window goes up in a fashion that is not smooth (fast-slow-fast-slow), repairs may be needed. Some vehicles require revised power window regulators, door modules, and/or reprogramming.

Vehicle: 1993-1998 (ZJ) Jeep Grand Cherokee with 4.0L engine 1999-2004 (WJ) Jeep Grand Cherokee with 4.0L engine 1997-2006 (TJ) Jeep Wrangler with 4.0L engine 1990-2001 (XJ) Jeep Cherokee with 4.0L engine

Concern: Engine is running HOT. Engine is tending to overheat. Temperature gauge reads higher than normal. No coolant leak, except if coolant boils over.

Cause: Water pump failure.

Resolution: Inspect and replace the water pump to correct.

Details: I have seen this problem only (1) time, but it is worth a mention. The heater hose coming off the thermostat housing was taking too long to get hot. This hose should get warm, then hot very shortly after the engine is started. Found the vehicle had an aftermarket water pump. Removed the water pump and found the impeller was loose on the shaft. The impeller was turning much slower than normal, causing lack of coolant flow, resulting in overheating.

Vehicle: 2004 (TJ) Jeep Wrangler

Concern: The MIL (check engine light) is illuminated. Scan tool reveals DTC P0455 large leak detected.

Cause: A leak in the evaporative emissions system was caused by the installation of an incorrect aftermarket fuel filler cap.

Resolution: Install the correct fuel filler cap.

Details: I've seen this problem dozens of times: customer loses gas cap, purchases and aftermarket cap, and then the MIL comes on. The correct cap is necessary to seal the system. There are (3) options to turn off the MIL: 1- Clear the codes by disconnecting the battery. 2- Run the evap test (3) times with scan tool. (3 good trips will clear the MIL) 3- Sinply operate the vehicle normally. The MIL will turn off after a few days.

Vehicle: 2003 (RS) Chrysler Town & Country 2003 (RS) Dodge Caravan

Concern: The MIL (check engine light) is illuminated. Scan tool reveals DTC P0455 large leak detected and P0442 Medium leak detected.

Cause: There is a leak in the evaporative emissions system.

Resolution: A visual inspection revealed a split hose at the rear of the charcoal canister near the fuel tank. Another split hose was found going to the purge solenoid located near the air filter box.

Details: After the hoses were replaced, the DRB3 scan tool was used to run the evaporative emissions monitor test (3) times. It passed every time and the MIL turned off. Visual inspection was the key.

Vehicle: 2009 (RT) Dodge Caravan, Chrysler Town & Country

Concern: No start. Engine will not crank or start. The battery is OK. The power windows are inoperative, among other things. The FOBIK will turn in the 'ignition switch' but the vehicle does not respond. In other words, most of the vehicle systems which come on when the key is in the RUN position were in fact not coming on. Scan tool reveals 'no response' from PCM and ABS. WIN has an active DTC P1600 (unknown DTC). There are no diagnostics for P1600.

Cause: The WIN (Wireless Ignition Node) has failed.

Resolution: Replace the WIN.

Details: The WIN is part of the 'ignition switch'.

Vehicle: 2004 - 2006 (JR) Chrysler Sebring Sedan, Chrysler Sebring Convertible, Dodge Stratus Sedan

Concern: Passenger side front carpet is wet. Gets wet when A/C is on.

Cause: Poor design of A/C drain tube.

Resolution: TSB 24-018-05 details installing a revised drain tube adapter and tube.

Details: Be sure to dry the carpet and replace padding as needed.

Vehicle: 2006 (DR) Ram Truck, 2005 - 2006 (LX) 300/Charger/Magnum, 2005 - 2006 (WK) Grand Cherokee, 2006 (XK) Commander

Concern: The rear of the sunroof glass is not flush with the roof of the vehicle. Possible windnoise or water leak.

Cause: Out of calibration

Resolution: First, UNCALIBRATE THE SUNROOF. Place the ignition switch in RUN position. Locate the sunroof fuse (Fuse 44 in the Power Distribution Center located in the trunk). While the sunroof is still in motion, have an assistant remove the sunroof fuse. Reinstall the sunroof fuse. Now, RECALIBRATE THE SUNROOF. Press and hold the sunroof vent switch until it stops at the full vent position. Verify sunroof operation by opening, closing, and venting the sunroof.

Details: If the above procedure is sucessful, have dealer reprogram/update the sunroof control module with new software.

Vehicle: Almost all 2008 and newer vehicles. Select 2007's.

Concern: "Change Oil Soon" message is displayed on instrument cluster. Oil change has been performed. How is the message reset?

Cause: -

Resolution: Sit in driver seat. Close door. Turn key to 'on' position but do not start the engine. Immediately press the accelerator fully to the floor 3 times (quickly). This will reset the message. If unsuccessful, retry.

Details: The engine computer determines oil change interval based on run time, number of cold starts, mileage, etc. It does not know, however, that the oil was actually changed. The message should be reset when oil change service is performed.

Vehicle: 1999-2004 (WJ) Jeep Grand Cherokee with limited slip differential(s)

Concern: Noise while turning sharply in parking lot. Rubbing noise/sensation. WJ

Cause: Lack of limited slip additive in differential(s)

Resolution: Remove and clean differential cover. Reinstall/reseal cover. Add full bottle (4 oz) of limited slip additive. Fill differential with 75W-140 synthetic gear oil. Test drive vehicle to re-check for noise.

Details: -

Vehicle: All Chrysler, Jeep, and Dodge vehicles

Concern: Alternator failure. The alternator (generator) is not charging. Electrical problems.

Cause: -

Resolution: Hold on for a minute. Alternator failures are extremely rare on Chrysler, Jeep, and Dodge. You need to rule out the battery, wiring, and PCM first before replacing the alternator.

Details: The alternator is controlled by the PCM (engine computer). Again, true alternator failure is very rare. In ten years as a dealer service dept tech, I have replaced maybe five alternators.

Vehicle: All vehicles

Concern: The MIL (check engine light) is on. The scan tool reveals DTC P0601 PCM internal controller failure.

Cause: The PCM (engine computer) has an internal fault.

Resolution: Replace the PCM to correct.

Details: This is an easy diagnosis. When P0601 is present, the solution is always to replace the PCM. There is no other possible cause. Normally the vehicle is still driveable.