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September 25, 2023
Car Repair

PCM (Powertrain Control Module) Troubleshooting

Last Updated on November 4, 2022 by SogouAuto


The Powertrain Control Module is the brain of your car. It takes input from sensors all over the vehicle and uses that information to control the engine, transmission, and emissions system. It’s a complicated piece of equipment, and when something goes wrong with it, your car will definitely let you know.


One of the most common problems is that the PCM can get overloaded with too much data. This can cause it to malfunction and throw off your car’s timing, fuel mixture, and transmission shifting. As a result, your car may run rough, stall frequently, or have trouble starting.


Another issue is that the PCM can develop corrosion due to exposure to moisture or chemicals. This can cause circuits to short out, which will also lead to all sorts of problems with your car’s performance.


Finally, there is always the possibility of physical damage to the PCM itself. This could be from a collision or an electrical surge that fries the circuitry. Regardless of how it happens, if the PCM is damaged, it needs to be replaced.


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