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Home >> Chevrolet >> 2002 >> Venture Plus >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics >> Diagnostic Tests >> DTC P0300-P0306: Engine Misfire Detected >> Test Description
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Test Description

The numbers below refer to the step numbers in the diagnostic procedures.

  1. 4

    Depending on the cause of the misfire, the Misfire History Cyl # counter will display a very large number for the misfiring cylinders. Values for the non-misfiring cylinders will be less than 1/2 as great as the misfiring cylinders. When investigating a misfire, always start with items associated with the cylinders that has the largest number of counts stored in the Misfire History Cyl # counter.

  2. 5

    If the misfiring cylinders are companion cylinders, the condition is most likely linked to the ignition system.

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