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.
DTC P0336 can be caused by secondary components leaking high voltage into the ICM. Check for the following conditions:
- Incorrect harness routing near the secondary ignition components.
- Ignition coil arcing to wiring harness or Ignition Control Module (ICM). Check ignition coils for cracks, for carbon tracking, or for other signs of damage.
- Secondary ignition wires arcing to the wiring harness.
- For an intermittent, refer to INTERMITTENTS in TROUBLE SHOOTING - NO CODES - 3.1L CENTURY, GRAND PRIX & MALIBU article.