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: 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: 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.
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.
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: All vehicles. (JK)(ZJ)(CS)(JC)(TJ)(XJ)(PT)(KJ)(KK)(KA)(AN)(ND)(DR)(DS)(WJ)(WK)(XK)(LX)(LH)(FJ)(JR)(JS)(RT)(RS)(NS)
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.
Vehicle: All Chrysler, Jeep, and Dodge vehicles. (JK)(ZJ)(CS)(JC)(TJ)(XJ)(PT)(KJ)(KK)(KA)(AN)(ND)(DR)(DS)(WJ)(WK)(XK)(LX)(LH)(FJ)(JR)(JS)(RT)(RS)(NS)
Concern: Alternator failure. The alternator (generator) is not charging. Electrical problems.
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: 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: 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.