Understanding Dodge PCM Electronics

photo via Wikimedia Commons

Solo Auto Electronics- Dodge PCM

The Powertrain control module, or PCM, is one of the most important parts of a Dodge vehicle. They receive error codes and signals from the entire car to make sure it’s running well at all times. When an error code is found, the vehicle owner will usually see a “check engine” light on their dash.

If the PCM fails, it’s usually due to a problem elsewhere in the car. An easy way to think of the PCM in a Dodge vehicle from 1993-2003 is that it’s the brains of the car. It works alongside the transmission control unit and even a body control module in Dodge Chryslers. When one of these “computers” fail on the car, so will the part that it controls. For example, if the PCM wears out, the battery might fail to charge. People often overlook this control box when looking for problems with their car.

Sensors are an essential component to the proper function of the PCM. Without these sensors, the PCM is useless. These devices are placed around the car. And a majority of them are placed within the engine compartment to manage it. In many cases a sensor will fail and affect the performance of the PCM.

A PCM can be easily reset by unhooking the black terminal from the battery. After this, insert the key to the “on” position for 30 seconds. Turn it off and then reconnect the terminal to the battery. Insert the key again and use a vehicle diagnostic kit, called an OBD (On Board Diagnostic) to see if the error code goes away. This process should be performed after a new part is installed, to make sure it’s working properly.

When a PCM is suspect to be the source of the problem in the car, get it checked out right away. Without the Dodge PCM, the electronic parts inside the vehicle and engine do not know what to do. The car can suffer a massive performance loss if and when this computer unit acts up.