Your check engine light can come on a host of reasons, ranging from a loose gas cap to a faulty engine component. If you see a light illuminated on your dashboard, you can use an OBD2 scanner to ...

What an OBD2 Scanner Can (and Can’t) Do Most 1996 or newer gas vehicles and most 1997 or newer diesel vehicles use OBD-II, per New York’s inspection guidance. The car runs self-tests on emissions ...

Add Yahoo as a preferred source to see more of our stories on Google. Modern cars are technological marvels, and understanding what’s happening under the hood has never been more important—or more ...