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How To Change The Engine Computer Module (ECM/PCM) on a 2001 Dodge Pickup

pcm ecm location

How To Change The Engine Computer Module (ECM/PCM) on a 2001 Dodge Pickup

2001 Dodge Truck Diagram Repair Guide


1-To avoid voltage spike damage to either the PCM or ECM, turn ignition to off, and disconnect negative battery cables before unplugging ECM connectors.
2-Be sure to disconnect both negative cables at both batteries.
3-Remove ECM’s 50–way electrical connector bolt. (A female 4mm hex head. To remove, use ball-hex bit or ball-hex screwdriver. ex. Snap-On t 4mm SDABM4.
4-Carefully remove the connector from ECM as bolt is removed.
Remove mounting bolts for ECM, then remove the ECM from your vehicle.


Note: Do not paint back of ECM as this will result in poor ground.
1- Clean all mounting points for ECM at engine block.
2- Install the three mounting bolts while ECM is positioned in place. Bolts are to be tightened to 24Nm, or 18 ft lbs.
3- If ECM pin connectors show damage or corrosion, make necessary repairs.
4- Use a quick drying electrical contact cleaner to clear 50-way electrical connector of debris and dirt.
5-Install 50-way connector to the PCM carefully, the tighter the connector hex bolt.
6- Install battery cables.
7- While the key is in “on” position, press throttle pedal to the floor slowly. Release slowly. It is critical not to skip this step so the CM can learn the accelerator pedal position’s sensor calibration. If this step is skipped, diagnostic codes may be displayed.
8-Use a scan tool to erase previous diagnostic codes from the PCM.


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Comments (3)

  • justin hebert Reply

    so can i just get a new pcm from pullapart n swap out or will it need special programming?

    October 30, 2022 at 1:35 pm
    • Mintt Reply

      You will need to reprogram and flash the latest software update that is available for VIN. Unfortunately just swapping the part will not work.

      October 30, 2022 at 8:32 pm
      • justin hebert Reply

        can i order one preprogrammed? its a 2001 dodge ram 1500 magnum

        October 31, 2022 at 9:54 am

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