When your car's oil has just been changed, it should be at its best, right? So why is it that sometimes after an oil change, ...

Have you been putting off dealing with your car’s check engine light? Many believe this signal is little more than a small ...

Related: Is Your Check-Engine Light On? 5 of the Most Common Causes Misfires usually cause the check-engine light to illuminate. Fuel economy also is likely to suffer, and emissions might ...

“Ignoring the Check Engine light can cause a car to fail an emissions test and can result in the need for additional repairs,” cautions David Rich, CarMD’s technical vice-president.

Catalytic converters can be both causes and victims of check engine lights. A failing “cat” can trigger a check engine light and/or produce an unpleasant exhaust odor, but converter failure is ...