Camshaft Position Sensor: Testing and Inspection

The Camshaft Position Sensor (CMP) is used to indicate camshaft position so that the Powertrain Control Module (PCM) can fuel the engine sequentically and determine which cylinder is misfiring when misfire is present. If the PCM receives an intermittent signal from the CMP, then the CMP Resync Counter will increment. In order to set a DTC, the PCM must see a minimum number of resync's within a maximum time.