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

You are driving your 2005 Cadillac CTS coupe along the highway on a long road trip. The music is blasting, the sun is shining ...

Outback has 110,000 miles on it. What maintenance is absolutely necessary? I change the filters regularly and the oil every 5 ...

After all, check engine lights are vague, so having a code to narrow down the problem is hugely helpful. This step could help with the next, which is taking the car in to be looked at by a ...

John Paul, AAA Northeast's Car Doctor, answers a question from a reader who wants a check engine light cleared.

Q: The check engine light came on in my daughter’s 2007 Volkswagen Jetta. It has a 2.5-liter engine, automatic transmission, and only 96,000 miles. My mechanic said it was a leak in the ...

Every car has its own language of light-up hieroglyphics on the dashboard. They’re your car’s way of asking for help. But those lights are not always easy to interpret. What it means ...

Discover essential car safety tips and checks to ensure a secure road trip. Prepare your vehicle for a safe journey with ...