When I got my first performance vehicle (a 2000 Subaru Forester STI) the first thing I bought for it was an OBD-II code reader so I could monitor the sensor levels and pull codes in the event anything ...

The dreaded check engine light came on in my BMW—so I grabbed my OBD2 scanner and got to work. In this video, I take you through the full diagnostic process, from plugging in the scanner to ...