Power Control Module again?

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02/08/2015, 10:23 AM
RAZ

Power Control Module again?

OK so here's the story about the problems with my VX.
Monday morning going to work it starts shifting very hard and engine check light comes on and TOD check light keeps coming on and off. So go back home idling at 3000rpms check codes P0122 Throttle Position Sensor/Switch A Circuit Low Input. Replace it same problem high idle but TOD is ok. Replace ICS with battery disconneted for a hour. Idles ok for 30 sec and goes to 2500rpms. Take it to a buddys auto shop he is getting P0123Throttle/Pedal Position Sensor/Switch "A" Circuit High Input. Replace TPS again now still high idle and P0101 - Mass or Volume Air Flow Circuit Range/Performance Problem changge that and its ok till a test drive and in a mile back up to 2500rpm. So he thinks its Power Control Module because after messing with senors ok till driving again. So I pick up VX and idle is ok but he says will come back I make appt at dealer to check it but on the way no Engine lights or problems. Drove it 40 miles yesterday all good. Going out again today but need to go 80 mile round trip to work tommorow and am worried I will get stuck. And thats the shorted verison!
Any ideas on whats going on here
Steve
02/08/2015, 10:33 AM
RAZ

Dealer says power control is $1005 but is no longer avaiable. And thats how I started looking for a used one but they say it is a one time flash so if you get one from the same year might work but not sure. Rebuilt ones are around $500 if you can find one and $150 and labor to flash. So looking at $800 and not sure if thats the problem.
02/08/2015, 03:47 PM
bartmanS4

I know that you should be able to pull one from a 98-99 and probably a '00 auto tranny Trooper. In '01 I think is when they moved the PCM to the engine bay and that one won't work. Get one from your local pull and pay. I'm running one from a '98 but it's a manual trans one. The one issue I had was the calibration of my fuel gauge. I fixed this by swapping the fuel level sending unit. The sending unit is very easy to pull off the donor vehicle (six Phillips screws) along with the PCM.
02/09/2015, 04:17 AM
RAZ

My gas gauge started going crazy about 2 weeks ago and I didnt think that had anything to do with it. Intersting could the sender be my whole problem
02/09/2015, 07:38 AM
bartmanS4

Quote:

Originally Posted by RAZ

My gas gauge started going crazy about 2 weeks ago and I didnt think that had anything to do with it. Intersting could the sender be my whole problem

No, it's just that the PCM is calibrated to that individual sender. Before I did my sender swap my gauge only went from full to half tank so the gain/offset was incorrect for my PCM until I put the matched sender in.