It’s easy to make the wrong decisions and make mistakes. If you’re fatigued or ill, you have a kind of brain fog that makes it harder to think. When you’re tired, you don’t operate at peak efficiency. In the meantime, here are six classic symptoms to diagnose a PCM problem. They have specialized equipment that allows them to read the error codes that the PCM is emitting. The best way to diagnose an issue with this system is to go to a qualified auto-electrician. It could mean throwing your timing and other vital systems out, too. Problems with this system mean that it can’t send messages to other systems within the vehicle. It is the car’s brain, and it controls everything in the vehicle.Ī bad car computer is a big deal. It doesn’t matter if you own a Ford or a Chevy, the PCM relay will be similar.
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