We'll explain how to use an OBDII code reader to clear Cummins fault codes, and we'll also explain how to clear the codes if you don't have access to a scan tool.

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

A scanner plugs into this connector. GM designed these pre-OBD-II systems to allow mechanics to read trouble codes without a scan tool.

These codes, known as OBD or OBD-II codes, are the key to diagnosing your issue. To read your OBD codes, you’ll first need to obtain an OBD scanner, a handheld device with a 16-pin plug that connects ...