Flag 63

OPTION CHECK SUM ERROR
Each time the PCM is powered up, a comparison of tire size and options are performed. Tire size and options must compare to valid combination of options stored in electrically erasable programmable read only memory (EEPROM).

CODE PARAMETERS

Information flag 63 will set if:
^ Invalid combinations of tire size and/or options.

DIAGNOSTIC AIDS
If information flag 63 is set, recalibrate PCM. If information flag 63 occurs again, replace PCM.