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Dodge Ram 1994-2001: How to Reset PCM

It's common practice to reset the engine's computer after performing modifications to your car or truck. By doing this, the computer and all related sensors go into a sort of learning mode, allowing it to adapt to changes made that could affect airflow or exhaust (O2 sensor) readings.

By Brett Foote - July 8, 2015

This article applies to the Dodge Ram 2nd Generation (1994-2001).

Your truck's PCM (powertrain control management) manages your engine as well as driveline components by reading data from sensors and using that data to make adjustments. The PCM can adjust and control ignition timing, transmission gear selection, traction controls, fuel injector input, forced air induction, emissions systems, camshaft position, the fuel pump, the cooling fan, and various other components that control your truck's performance. The PCM "learns" your particular driving style over a short period of time and optimizes these components based on how you drive. This means that when you change components, especially when you install aftermarket performance parts, it's a good idea to reset your PCM so it can "relearn" them. Resetting your PCM is a quick and easy job that anyone can complete. Keep reading as this article will guide you through the process.

Materials Needed

  • 1/2" wrench

Step 1 – Disconnect negative battery terminal

Pop the hood, then use a 1/2" wrench to disconnect the negative (black) battery terminal, and set it aside.

Figure 1. Disconnect the negative battery terminal.

Step 2 – Turn the ignition to the "on" position

Insert the key in the ignition and turn it to the "on" position. Do not turn it past this position as if you are starting the truck. Wait 30 seconds, then turn the key to the "off" position and remove it from the ignition.

Figure 2. Turn the key to the "on" position and wait 30 seconds.

Step 3 – Reconnect the negative battery terminal

Reconnect and tighten the negative battery terminal. The PCM will be reset, and after a few days of driving it should "relearn" your new parts or particular driving style.

Figure 3. Reconnect the negative battery terminal.

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