Resetting a check engine light can save you stress and a trip to the mechanic so long as you have access to an OBD2 scanner.

Your Check Engine light is shining like a beacon of bad news. What's going on? The car still runs well and idles fine. Maybe it's an electrical snafu. It's sure to turn itself off at some point ...

I took my car in to the shop because the "check engine" light was on and found out this was simply due to my gas cap being loose. Why would that set off the warning light? – Louis in Duncan, B.C ...

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 ...

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.

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.