Changing the oil is the most common maintenance you'll have to do on your car, but what happens when the check engine light ...

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 information.

Consumer Reports explains what the check engine light means and what to do when you see it: how to tell if your car has a loose gas cap—or a serious engine problem.

GM has issued a recall for certain examples of the 2015 to 2017 model-year Chevy City Express utility van over an issue related to the engine control module.

During their final years, a handful of automakers experimented with computer control of the humble carb, trying to squeeze out every last bit of efficiency and reduce pollution as much as possible.