Diagnostic Aids

WARNING: This page is about a different car, the 2002 Pontiac Grand Prix, 2002 Chevrolet Malibu, and 2002 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. Inspect for the following conditions:

Incorrect harness routing near the secondary ignition components.
Ignition coil arcing to wiring harness or IC module Inspect ignition coils for cracks, for carbon tracking, or for other signs of damage.
Secondary ignition wires arcing to the wiring harness.
If the DTC is determined to be intermittent, refer to INTERMITTENT CONDITIONS under SELF-DIAGNOSTIC SYSTEM.