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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 246 (Engine Controls Self-Diagnostics - 3.1L Engine) >> Diagnostic Tests >> DTC P0300-P0306: Engine Misfire Detected >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix, 2003 Chevrolet Malibu, and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
  1. Excessive vibration from sources other than the engine could cause DTC P0300 to set. The following are possible sources of vibration:
    • Variable thickness brake rotors. See appropriate article in BRAKES.
    • Worn or damaged accessory drive belt. See appropriate COOLING SYSTEM SPECIFICATIONS & DRIVE BELT ROUTING article.
  2. Spray water on the secondary ignition components using a spray bottle. Look and listen for arcing or misfiring.
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