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.

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The Check Engine Light (CEL) on your car isn't always a sign of impending doom, but you should never assume the issue is minor.

Did you use an OBD2 scanner on your car to figure out why the check engine light is on, only to get the P0303 code? Here's what it means, plus possible fixes.

If your check engine light is on or flashing, REV is able to check the engine code, list all of the engine codes stored in the vehicle, and reset the stored codes or check engine light.

What Does Code P0442 Mean? Engine code P0442 means a small leakage in the evaporative emission control system. It is not a critical problem, but it could be annoying and cause something more serious.

While your check engine light is obviously meant for engine issues, it can often give you clues to problems in other parts of the car as well.

Your check engine light can come on for a lot of different reasons, but there are only a few that occur after putting in gas. Here's what we know.

The folks at CarMD are back with their 2021 Vehicle Health Index, which documents what causes your car’s dreaded check-engine light to illuminate.

And yes, an illuminated check-engine light is a roadworthy item, so the car would (or should) not have passed a roadworthy inspection with the lamp illuminated. Whether the roadworthy tester is at ...