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.

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.

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.

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 ...

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.

So what’s a Fox-body owner to do when the Check Engine light comes on or stays on while driving around? Check for trouble codes of course.

To convince the transmission control module that a working automatic was still installed and clear the fourteen-odd diagnostic codes, [Dean] put together a block of eight common automotive relays.

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

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.