Conditions For Setting DTC
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 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 55 kPa or more.