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.

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 ...

Your Check Engine Light Is On One of the primary symptoms of a failing camshaft position sensor is an illuminated check engine light.

So what’s a Fox-body owner to do when the Check Engine light comes on or stays on while driving around? Check for trouble codes of course. Sure, you could spend the money on a good Ford-specific ...

There are countless reasons why your check engine light could turn on, including a wiring fault, a bad oxygen sensor, or a misfire. Sometimes, the check engine light won’t reset on its own, even ...

The knock sensor on your Toyota VVTi engine is basically a microphone that senses if detonation occurs in one of the cylinders. The detonation happens when the fuel-air mixture ignites before it ...

I have a 99 Mustang. About a year or so ago, my check engine light (hereby known as the CEL) went on. I took it to my local shop, who charged my $75 and said they fixed it. 2 days later, it comes ...

Owners of 2007-09 Honda CR-V models may come into your store with the check-engine light illuminated and one or more of the following trouble codes stored in PCM memory: P0134, P0135, P0171 and P1157.

The sensor voltage signal is known to be sensitive to exhaust temperature. In the present investigation, temperature sensitivity of the oxygen sensor was measured over a wide range of engine operating ...