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

If you have a car built in the last 30 years, your vehicle comes with a built-in diagnostic port that can make troubleshooting a problem simple.

We may receive a commission on purchases made from links. If you own a car built in 1996 or later for the U.S. market, the odds are overwhelming that it has an OBD port. You may have even noticed ...

Your vehicle's OBD port is essential when diagnosing mechanical problems, but that's not all it can do.