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 ...

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.

If your check engine light flashes and then stops, it could signal a serious issue. Learn what it means and what steps to take next.

But perhaps the biggest check engine light problem is that, for many motorists, it’s just too easy to ignore, especially if the vehicle isn’t exhibiting any specific mechanical issues.

But the check engine light could indicate a much more serious problem, such as faulty ignition. The problem could be minor, or it could be a risky malfunction that would not only be costly, but ...

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.

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 your vehicle’s catalytic converter might first become apparent through poor acceleration, a rotten-egg smell from the exhaust, or the check-engine light coming on.

In some cases, the light changes from yellow to red or orange to indicate a more serious mechanical problem. Click here to see the 20 most common reasons for a check engine light.

Here’s a look at the five most common check engine light-related problems and the average cost to have them repaired – including parts and labor – according to the 2017 CarMD Vehicle Health ...

Dear Doctor: I own a very low mileage 2000 Toyota Corolla with 37,400 miles. It is used mostly for local city driving. The “check engine” light came on and the code read “lean condition ...