If your vehicle is throwing a check engine light, but you don't have a diagnostic scanner handy, here are three tricks to try before seeing a mechanic.

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.

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 ...

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.

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.

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

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.

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.

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.

When the check engine light comes on, it’s indicating that there is some issue with the car that should be checked out. This article provides tips on what this signal could mean, and even how to ...

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.