Sunfire L4-2.2L VIN 4 (1996)
Camshaft Position Sensor: Description and Operation
DESCRIPTION
The Camshaft Position Sensor (CMP) is used in order to correlate the crankshaft to the 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 in order 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.
