Performing a reset of the powertrain control module, also referred to as the PCM, is fairly easy, and takes about five to seven minutes. The first thing You will need to do is go to the front of Your vehicle. Open the hood, and remove the negative terminal from the wires of Your battery. The battery should be to the right of the engine, toward the front of the engine bay. Next, go to the driver's side of the vehicle and have a seat. Turn the ignition to the start position for a count of 30 to 40 seconds. Turn it back off, then go back to Your battery, and replace the negative terminal to it's original connection. The PCM should now be reset.
Anita B.
April 9, 2020
To reset the pcm in a 2001 dodge ram disconnect the negative terminal on the battery, turn the key to start for 30 seconds, and then reattach the negative battery terminal.
Dustin
May 3, 2023
My 2002 ram starts up then after 3 seconds it dies why is that
WilliamBarnes
August 16, 2023
Mine does thesame no bus turns over no start gagesdon' work no fire fuel pumpdon'tcone on
It's still not starting, there's still a no bus light, it's cranking, I just can't find the issue and it seems the codes 920 921 999 are no communication, something isn't relaying message to the PCM.
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