Conditions For Setting DTC
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.
The PCM does not detect any change in the CMP sensor signal for 35 crankshaft revolutions, 70 combustion events, when Manifold Absolute Pressure (MAP) is at 30 kPa or greater.