Posts Tagged: ECU verus ECM

What’s the Difference Between an ECU, ECM, TCM, and PCM?

ECU, ECM, TCM, and PCM: Understanding the Differences You’re probably aware that the engine and transmission in your car are run by a computer. But if you’ve done any work on your car you’ve probably run into different acronyms for that computer. Some carmakers call it a PCM, ECM, ECU, and then there’s the TCM. Is there a difference between all of these computers, and if not, why are there so many different name? This article will break down the differences between the ECU, ECM, TCM, and PCM What is … Read More