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Discussion Starter · #1 ·
2011 v6 police package Dodge Charger

Jan.3- my car wasnt cutting on as I was leaving the house house as you can see (in the image) :
Engine light
2 traction control lights
Ecm light are all illuminated

Jan. 10- replaced throttle body , camshaft sensor, and oil pressure sensor switch
Car was running perfectly fine

Jan.11- It does a long start and it’s high idle (not due to cold start) and I press the accelerator and it won’t go past 2000 rpms

Jan-13th accelerator pedal position sensor replaced (still nothing)

Car is not overheating and idk what to do at this point I’m thinking pcm ?

the codes left :
P0642- sensor reference voltage 1 circuit low
P2638- torque management feedback signal performance
U1407- Implausible engine torque request signal received
U1404-implausible static engine torque signal received
U1400-implausible tps signal received
Car Speedometer Vehicle Wheel Tachometer

Premium Member
2,985 Posts
If you have not yet, get your battery properly load tested to rule out any issues there.


68 Posts
Looking at the codes, and without verifying how the engine management software works,..

My first thought is to focus on P0642. A quick look suggests all the other codes could be due to this initial low voltage reference signal.

Sure, it could be due to a bad PCM/ECM, but a loose connector or broken wire is far more likely.

If it were me, I would focus on this code first. Replacing parts on speculation is way down my lost as a troubleshooting strategy.
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