This is what the check engine light looks like. By Consumer Reports You’re driving along in your car or truck and suddenly a yellow light illuminates on your dash telling you to check or service ...

The Engine Control Module, or ECM, directly controls the engine. Still, it can’t do that properly without the Transmission Control Module or TCM and PCM, which work together and exchange ... Look for ...

The power control module, aka PCM, manages the engine, transmission and other systems based on information it receives from various sensors around the vehicle. Opens in new window Skip to main content ...

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 ...

Although “ECU” typically stands for engine control unit, that’s not always the case. It can also mean electronic control unit, which may be the same thing, but could also be something that ...