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 ...

The check-engine light is a signal that the onboard diagnostics system (or OBD II) has detected a malfunction in the vehicle's emissions, ignition or fuel systems.

A check-engine light could be a gentle reminder or a sign of something catastrophic. We explain what a malfunction indicator light is and what you can do about it.

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

What Your Check Engine Light Means When your check engine light turns on, one or more onboard diagnostic trouble codes are stored in the car’s computer.

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.

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

Ignoring a check engine light might feel harmless if the car still runs smoothly, but the warning signals more than a mi ...

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.

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.