From roof racks to tires, maintenance and driving habits, you can likely save hundreds of dollars per year at the pump.

Modern cars are computers on wheels, and OBD2 scanners give you direct access to their inner workings. Whether it’s clearing a check engine light, spotting a failing sensor, or even tuning for ...

If you have a check engine light on, a diagnostic tool is great for troubleshooting the problem. Here's what you need to know ...

The check engine light is the worst kind of message. It tells you something is wrong without telling you what, and the dealership will happily charge a ...