Questions and Answers

Plymouth Grand Voyager DTC P0106 Q. Dear Sir, I have a 1997 Plymouth Grand Voyager SE with a 3.0 liter fuel injected engine, automatic transmission, A/C and 175,000+ miles on it. I have replaced the timing belt twice since owning the Van, the water pump once, and most recently, the fuel pump. After I replaced the fuel pump, the Van drove fine for a month or so, then it started cutting out and eventually died.

It starts and runs until it warms up, then cuts out and dies.

Just so you know, I just transferred from Hawaii to San Diego, California and The Van is in Hawaii and we are trying to help our Daughter, who is attending college there, get this fixed without having a dealership intervene.

She had some mechanics at the local Army Base pull the codes from the computer, all they see is; P0106 "Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem".

I am assuming the Map sensor/barometric sensor has failed, any thoughts on this? I don't want to send this vehicle to a dealer if I don't have to, but I need another opinion. Any Help would be greatly appreciated!

Ben

A. Chances are good that the Manifold Pressure/Vacuum (MAP) sensor is bad. If a check of the wiring shows them to be good, then I would go ahead and replace it. The only other possibility is a bad Powertrain Control Module (PCM) and I kind of doubt that it is bad.

Here is the test procedure for the MAP sensor.

NOTE: To perform a complete test of the MAP sensor and its circuitry, use a scan tool and appropriate Diagnostics Procedures. To test the MAP sensor only, refer to the following:

CAUTION: When testing the MAP sensor, be sure that the harness wires are not damaged by the test meter probes.

1. Test the MAP sensor output voltage at the MAP sensor connector between terminals 2 and 3. With the ignition switch ON and the engine not running, output voltage should be 4 to 5 volts. The voltage should drop to 1.5 to 2.1 volts with a hot, neutral idle speed condition.
   • If OK, go to next step.
   • If not OK, go to step 3.

2. Test PCM terminal 36 for the same voltage described in the previous step to verify wire harness condition.
   • Repair as required.

3. Test the MAP sensor ground circuit at sensor connector terminal 1 and PCM terminal 43.
   • If OK, go to next step.
   • If not OK, repair as required.

4. Test MAP sensor supply voltage between sensor connector terminals 2 and 1 with the key ON. The voltage should be approximately 5 volts (4.5 to 5.5V). Five volts (4.5 to 5.5V) should also be at terminal 61 of the PCM.
   • If OK, replace MAP sensor.
   • If not OK, repair or replace the wire harness as required.