Powertrain control modules determine how much fuel to inject into the cylinders and when that fuel should be ignited. If there is a problem, the PCM may be the issue itself, or it could be the sensors ...

Whether you like it or not, your vehicle is filled to the brim with computers. While these computers are a dream come true when everything is working the way it should, they can quickly turn into a ...

There was a time that vehicles didn’t come with sophisticated computer systems. Those cars and trucks used pneumatic and mechanical systems to regulate idle speed, valve timing, and fuel delivery.

The powertrain control module (PCM) in your Jeep Wrangler – often referred to as your engine’s “computer” – acts as the brain of your vehicle’s engine. More specifically, the PCM in your Jeep is ...

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 ...

A contributor to CarBuzz since April 2025, Ben also was a finalist in The Intercooler Young Writer Compition in 2021, has done a placement with AutoCar, and runs his own independant automotive blog.