Remember, the code reader won't tell you how to fix the check engine light—the code it reads just directs you to the fault. From there, unleash your mechanical prowess and discover the cause!

With a code reader you might find you can simply turn off the check engine light yourself. However, if you haven’t fixed the problem, it will eventually come on again.

Discover what an OBD2 scanner is and how to use it to diagnose and fix car problems before they escalate into major repairs.

Did your vehicle's check-engine light just pop on? An OBD-II scanner can point you in the right direction—and potentially save you a bundle.

Did your vehicle's check-engine light just pop on? An OBD-II scanner can provide some direction. We tested a handful to find ...

Does a check-engine light really mean something is wrong with your engine? An OBD2 scanner can tell you. What you should do if your idiot light comes on.

Here's how to read OBD codes so that when that Check Engine light pops on, you can use an OBD scanner to find out what’s wrong with your vehicle ...

If you see the check engine light and haven’t filled up with fuel recently, it’s a good idea to use a code reader or take your vehicle to a shop for diagnosis.

The more modern code readers will explain what the issue is via a smartphone app or a more detailed interface. This information gives you a reference point when speaking with your mechanic, to ...