The Check Engine light may indicate a serious issue with your Cummins diesel engine. Here's how to check and clear the fault codes triggering that light.

It has a check engine light on and I was looking for the connector to install the jumper wire (paper clip) to retrieve the fault codes. The connector does not look like the one in my C3 Corvette.

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

In the beginning, only a few people took the effort to understand it. Check out the diagnostic trouble code and how to break it!

We've compiled a list of some of the best OBD2 diagnostic scanners describing their features, specifications, compatibility, and benefits.