Mazda 3 P0685: Meaning, Causes, + Diagnosis
P0685 is a somewhat rare OBDII trouble code. It’s a general code, so it has the same meaning for the Mazda 3 as any other vehicle. It indicates that the circuit that provides power to the PCM is not functioning properly. Most of the time, P0685 will cause your 3 not to start, which leaves … Read more