Alero L4-144 2.4L DOHC VIN T SFI (2000)
Camshaft Position Sensor: Description and Operation
The Camshaft Position (CMP) sensor is used to correlate crankshaft to camshaft position so that the PCM can determine which cylinder is ready to be
fueled by the fuel injector. The CMP sensor is also used to 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. When the PCM cannot use the information from the CMP sensor, a
DTC is set and the PCM will fuel the engine using the Alternating Synchronous Double Fire (ASDF) method. This sensor has no effect on the electronic
ignition system.
A malfunction in the CMP sensor circuits will cause a DTC P0341 or P0342.
