Lumina V6-3.1L VIN J (2000)
Camshaft Position Sensor: Description and Operation
Camshaft Position (CMP) Sensor and Cam Signal
Locations View
The camshaft position sensor 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 intake 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 Camshaft Position (CMP) Sensor Performance 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.
