CarMD’s latest study looks at the most common check-engine light repairs and their average costs over the previous calendar year, then ranks the results.

So it's scary to see your check engine light come on or hear weird noises. Even worse, if your vehicle suddenly stops working, it can disrupt your schedule and take a toll on your finances.

Ignoring a check engine light might feel harmless if the car still runs smoothly, but the warning signals more than a minor ...

Whatever the cause, you'll want to fix the problem as soon as possible — not just to eliminate the P0303 Engine Code and your Check Engine Light, but for your own safety and to prevent further ...

The most frequent “check engine light” fix noted in a recent report is to replace the catalytic converter, which costs an average $1,313. It should come as no surprise to anyone who’s been ...

If you're facing a check engine light with codes related to the mass air flow (MAF) sensor or vacuum leaks, this DIY guide will help you troubleshoot and fix the problem without the need for ...

"The check engine light is designed to come on when a vehicle's on-board diagnostic system sees a problem that impacts emissions or drivetrain issues," said David Rich, CarMD technical vice president.

Is that knocking sound your engine is making just a case of low-octane fuel, or is it something more serious? The answer is crucial for your engine's health.