Diagnostic Aids

WARNING: This page is about a different car, the 2002 Pontiac Sunfire, 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, and 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

If DTC P0336 is also set, diagnose that DTC first. An Intermittent crank signal will result in an interrupted cam signal and may set this DTC.
To locate an intermittent problem, use the scan tool to monitor CMP Active Counter while running the engine. The counter should continuously count up to 255, then reset to zero. The counter will stop counting if a fault occurs in the cam signal circuit. If this DTC is determined to be intermittent, refer to INTERMITTENT CONDITIONS under SELF-DIAGNOSTIC SYSTEM.