Hard Code

Any Diagnostic trouble codes (or One-Trip failure or drive cycle) that comes back within one cycle of the ignition key is a "hard" code. This means that the problem is there every time the TCM checks that circuit or function.

NOTE: OBDII CODES WILL NOT SET WITH JUST THE IGNITION KEY ON. THEY MUST BE DRIVEN, IN THE VEHICLE START AND DRIVE CYCLE(S) SUCH THAT ALL DIAGNOSTIC MONITORS HAVE RUN.