Diagnostic Aids

WARNING: This page is about a different car, the 2003 Pontiac Sunfire, 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

The following conditions may cause this DTC to set: Low resistance in both the No. 1 and No. 3 secondary ignition circuits High resistance in both the No. 4 and No. 2 secondary ignition circuits An intermittent Crank Signal.
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 INTERMITTENTS in TROUBLE SHOOTING - NO CODES - 2.2L ALERO, CAVALIER, GRAND AM & SUNFIRE - GASOLINE article.