Here are our pro tips for diagnosing a check engine light. Head to your local auto parts store and rent an OBD2 scanner to see what’s what. The staff will also help you read the code.

The check engine light is your car’s way of alerting you that something's amiss — but it could be as minor as a loose gas cap, or more serious, like a faulty oxygen sensor. Repair costs for ...

Does a check-engine light really mean something is wrong with your engine? What you should do if yours comes on.

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 car's check engine light is a car's way of telling you something is wrong, so it should never be ignored.

An OBD2 scanner is just a good thing to have, as modern cars sometimes throw check engine lights for good reasons, and for bad reasons. I’m looking at you, evaporative emissions.

The Check Engine light may indicate a serious issue with your Cummins diesel engine. Here's how to check and clear the fault codes triggering that light.

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While "Check Engine" and "Service Engine Soon" may sound like they indicate the same issues, they're actually for two different types of problems.

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.