If your vehicle is throwing a check engine light, but you don't have a diagnostic scanner handy, here are three tricks to try before seeing a mechanic.

A check-engine light could be a gentle reminder or a sign of something catastrophic. We explain what a malfunction indicator light is and what you can do about it.

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

Here are our pro tips for diagnosing a check engine light. Head to your local auto parts store and rent an OBD2 scanner to see what’s what. The staff will also help you read the code.

Your check engine light can come on for a lot of different reasons, but there are only a few that occur after putting in gas. Here's what we know.

What Your Check Engine Light Means When your check engine light turns on, one or more onboard diagnostic trouble codes are stored in the car’s computer.

You Can Find Out What Your ‘Check Engine’ Light Means for Free Sure, you could take it to a mechanic—but there's a quicker way, and it's free.

Some cynics believe the “Check Engine” light was invented to get vehicle owners to schedule more visits to the dealer for service.

GM TechLink has found a wiring issue in GMC Canyon and GMC Sierra 1500 trucks that can make the check engine light stay on and cause false DTC code returns.

What Is the First Thing to Check When the Check Engine Light Comes On? Start by checking the gas cap first, since that is easy to fix. Beyond that, it’s not a good idea to try and guess what the cause ...