Mazda 323/MX-3/626/MX-6/Millenia/Protégé 1990-1998 and Ford Probe 1993-1997

General Information


All Mazdas have self-diagnostic capabilities. The ECU monitors all input and output functions within the electronic engine control system. If a malfunction is detected, the information will be stored in the ECU memory in the form of a 2 or 3 digit code.