Changing the oil is the most common maintenance you'll have to do on your car, but what happens when the check engine light comes on afterward?

Your engine oil plays a crucial role in your vehicle's performance, but could low levels trigger a check engine light? Here's what you need to know.

What Causes the Check Engine Light to Come On? Every vehicle contains many sensors designed to illuminate the check engine light, signaling something is not safe or not operating properly. Many of ...

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.

"The check engine light is designed to come on when a vehicle's on-board diagnostic system sees a problem that impacts emissions or drivetrain issues," said David Rich, CarMD technical vice president.

Q. I have a 2004 Dodge Dakota V6 engine with four-wheel drive and have an engine light question. Recently my truck had a check engine light come on and the engine code was PO508. So far, we have ...

If the check engine light comes on again, though, you’ll need to have the car scanned. When that light comes on, the computer stores a “fault code” that tells your mechanic why, so he knows ...

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.