What is an ECU, PCM, and ECM? Electronic Control Unit (ECU), Powertrain Control Module (PCM), and Engine Control Module (ECM are all terms used interchangeably to refer to the computer system that controls various aspects of your vehicle's performance. Here's a breakdown of each component: In this comprehensive guide, we will break down the differences between ECU, PCM, and ECM, explain their functions, and provide tips for troubleshooting common issues. By the end of this article, you'll h...

What is an ECU, PCM, and ECM? Electronic Control Unit (ECU), Powertrain Control Module (PCM), and Engine Control Module (ECM are all terms used interchangeably to refer to the computer system that controls various aspects of your vehicle's performance. Here's a breakdown of each component: In this comprehensive guide, we will break down the differences between ECU, PCM, and ECM, explain their functions, and provide tips for troubleshooting common issues. By the end of this article, you'll h...