Pontiac Firebird P0621: Meaning, Causes, + Diagnosis
P0621 is a generic OBD2 code, which means that it has the same meaning for the Pontiac Firebird as it would any other vehicle. However, it can be challenging to diagnose due to the necessity of removing the instrument cluster. OBD2 P0621 indicates an issue with the circuit that controls the generator lamp, which is … Read more