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 ...

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 ...

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.

I have the check-engine light on in my 2011 Mitsubishi Pajero Platinum and have replaced everything electrical to do with the EGR system but the light won't go off. What are the possible causes and ...

Three weeks later, after I changed my oil, I noticed that the check engine light was off. Did the light burn out? No, because when I turn the key to start the car, I see it light up.