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.

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

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.

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

A vehicle’s Check Engine light can turn any car ride into a harrowing experience.

Problems with catalytic converters are the most common issues that caused Check Engine Light alerts in cars last year and came with a hefty repair bill.

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.

Many drivers don’t know what the “check engine” or “service engine soon” warning light on the instrument panel means. Understanding the purpose of this light, and knowing what actions to ...

CarMD’s latest study looks at the most common check-engine light repairs and their average costs over the previous calendar year, then ranks the results.

It's tempting to keep driving, but choosing to ignore your check engine light could result in expensive repairs down the road.

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.