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 ...

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 ...

The EPC Light is a troubleshooting light that appears most commonly on cars made by Volkswagen Audi, but it could be a sign of something seriously wrong.