Cutlass Supreme V6-191 3.1L VIN M SFI (1997)
Camshaft Position Sensor: Description and Operation
Camshaft Position Sensor
DESCRIPTION
The Camshaft Position Sensor (CMP) sends a cam signal to the PCM which uses it as a sync pulse to trigger the injectors in proper sequence. The
PCM uses the CAM signal to indicate the position of the #1 piston during its power stroke. This allows the PCM to calculate true Sequential Fuel
Injection (SFI) mode of operation. If the PCM detects an incorrect CAM signal while the engine is running, DTC P0341 will set.
If the CAM signal is lost while the engine is running, the fuel injection system will shift to a calculated sequential fuel injection mode based on the last
fuel injection pulse, and the engine will continue to run. The engine can be restarted and will run in the calculated sequential mode as long as the fault
is present with a 1 in 6 chance of injector sequence being correct.
