Your car's check engine light is a car's way of telling you something is wrong, so it should never be ignored.

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 ...

Check, replace and maintain the spark plugs in your car or motorcycle with this easy guide.

DEAR CAR TALK: I have a 2013 Camaro with the V-6 engine. When I changed the spark plugs, the old plugs from cylinders two to six were light tan in color, but plug No. 1 was dark and sooty. Is this ...

Read a good spark plug lately? We hope so, for your engine's sake. But spark plug reading—the traditional way to check your fuel mixture and monitor other vital conditions in the combustion ...

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.

CarMD.com, a provider of automotive diagnostic data, reported 675 different possible reasons for a check engine light to come on.

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.

Your engine oil plays a crucial role in your vehicle's performance, but could low levels trigger a check engine light? Here's what you need to know.

CarMD’s latest study looks at the most common check-engine light repairs and their average costs over the previous calendar year, then ranks the results.