Circuit Description
WARNING: This page is about a different car, the 2002 Pontiac Sunfire and 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
The Camshaft Position (CMP) sensor indicates the camshaft position so the Powertrain Control Module (PCM) can determine which cylinder is misfiring when a misfire is present. With the engine running, the CMP activity counter will increment. Whenever the PCM receives an intermittent signal from the CMP, then the CMP resync counter will increment.