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Home >> Pontiac >> 1998 >> Firebird Formula, Automatic >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Module >> Diagnostic Tests >> DTC 12: Diagnostic System Check >> Description

DTC 12: Diagnostic System Check: Description

DTC 12 is always displayed as the first code, indicating diagnostic display is in progress. If DTCs do not display, go to TESTING.

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