What Does Code U0100 Mean? U0100 stands for “Lost Communication with ECM/PCM.” The Engine Control Module (ECM) is the computer responsible for controlling the engine. The ECM communicates with other ...

A powertrain control module handles the emissions, transmission, and charging systems of your vehicle. As a powertrain module, it is responsible for overseeing the driveline and engine as well. The ...

For example, an older vehicle may use an ECM and a TCM (transmission control module) to accomplish many of the same tasks as a PCM does in a newer car. The PCM and ECM perform similar duties when ...

The powertrain control module, aka PCM, is your vehicle’s brain. It manages the engine, transmission and other systems based on information it receives from various sensors around the vehicle ...

The engine controller—first called an engine control module (ECM), and then later called a powertrain control module (PCM) when the electronically controlled transmission was added—had the ...

What is the code P0123 on a Ford F150? The P0123 trouble code is generic, so it’s the same across manufacturers. With this code, the Engine Control Module (ECM) or Powertrain Control Module (PCM) ...

Electronic control units — of which there can be multiple on a car — may have specific functions that have nothing to do with the engine, such as controlling airbags or power door locks.