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Home >> Pontiac >> 2002 >> Firebird Formula, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 5.7L >> Diagnostic Tests >> DTC P1381: Misfire Detected - No EBCM/Pcm Serial Data >> Test Description

Test Description

The number below refers to the step number in the diagnostic procedures.

  1. 1

    Service the ABS system before diagnosing for a misfire, because an actual engine misfire may or may not exist. The following examples illustrate how this DTC can be set with or without an actual engine misfire:
    • There was an actual engine misfire during an ABS system malfunction.
    • The vehicle operator drove on a rough road, the ABS system could not detect this condition due to a malfunction, and the PCM interpreted the variations in the crankshaft speed caused by the rough road as a misfire.