Cavalier L4-144 2.4L DOHC VIN T SFI (1997)
Camshaft Position Sensor: Description and Operation
The Camshaft Position Sensor (CMP) (1) is used to correlate crankshaft to camshaft position so that the Powertrain Control Module (PCM) can
determine which cylinder is ready to be fueled by the 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 (EI) system.
A fault in the CMP sensor circuits will cause a DTC P0341 or P0342.
