What does Check Engine Light Mean?

The check engine light—is one of the most common and often confusing indicators on your car’s dashboard. But what does it mean? Let's demystify the check engine light, understand its function, explore possible reasons it might appear, learn how to prevent it, and discuss what to do if it comes on.

The Function of the Check Engine Light

The check engine light is part of your car's onboard diagnostics system (OBD). Its job is to monitor your vehicle's engine and emissions system. When the check engine light illuminates, the ...