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Home >> GMC >> 2002 >> Jimmy 2D Utility, Part Time, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 4.3L >> 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 before diagnosing for a misfire, because an actual engine misfire may or may not exist. The following 2 examples illustrate how this DTC can be set with or without an actual engine misfire:
    • There was an actual engine misfire during an ABS malfunction.
    • The vehicle operator drove on a rough road, the ABS could not detect this due to a malfunction, and the PCM interpreted the variations in crankshaft speed caused by the rough road as a misfire.

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