What is a PCM in a car? The term PCM stands for powertrain control module, and is a critical piece of equipment within your vehicle, but do you know what it does? Whether you shuttle the kids around in a Toyota RAV4 or spend the weekend doing laps in a Porsche 911, it is an essential part of every car. In this article, we will look at what the power control module does in a car, how it is different to an ECU, and what happens if it fails.
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