What the Check Engine Light Means The check engine light is part of your car’s so-called onboard diagnostics system. Since the 1980s, computers increasingly have controlled and monitored vehicle ...

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.

The dreaded reduced engine power light (better known as the "check engine" light) can mean any number of bad things. Is it OK to keep driving when it comes on?

Nothing grabs a driver's attention quite like a warning light on the dashboard — especially when it's the check engine light or the AWD (all-wheel drive) light. One moment you're cruising along ...

Many drivers don’t know what the “check engine” or “service engine soon” warning light on the instrument panel means. Understanding the purpose of this light, and knowing what actions to ...

Does a check-engine light really mean something is wrong with your engine? What you should do if yours comes on.

Question: The “check engine” light came on yesterday on my 2000 Jeep Grand Cherokee. What is the cause, and what will it cost to correct? Martin Answer: We get this question often, but … ...

What Does The TPMS Light Mean? In its most basic sense, the TPMS light indicates that your tire pressure is too low or too high. But there are a few other things to be aware of. For one thing, it’s ...

What does the check engine light mean? Modern cars have literally dozens of sensors around them to ensure that the engine is running safely, efficiently and not contributing unnecessarily to the car's ...