Q:Hi James. I keep having an oxygen sensor fault code for a lean exhaust with my '97 Corvette. I've taken the vehicle to the dealer several times but the problem keeps recurring. I would like to try ...

An OBD2 (On-Board Diagnostics II) scanner can provide information about the status and health of various vehicular systems.

Your vehicle has a problem if the check engine light (CEL) glows. Diagnostic trouble codes (DTCs) stored in the computer help find the cause.