Camshaft Position Sensor: Description and Operation

Camshaft Position Sensor:

DESCRIPTION
The camshaft position sensor is located on the rear cylinder bank (BANK 1) in front of the exhaust camshaft. The camshaft position sensor extends into the rear cylinder head and is sealed with an O-ring. The camshaft position sensor is not adjustable.

As the rear cylinder bank exhaust camshaft turns, a steel pin on its drive sprocket passes over the magnetic camshaft position sensor. This creates an "ON-OFF-ON-OFF" signal sent to the ignition control module similar to the crankshaft position sensors. The camshaft position sensor produces one "ON-OFF" pulse for every one revolution of the camshaft or every two revolutions of the crankshaft. This allows the ignition control module to recognize camshaft position.

CAM SIGNAL
The PCM uses this signal to determine the position of the #1 piston in its power stroke. This signal is used by the PCM to calculate true Sequential Fuel Injection (SFI) mode of operation. A loss of this signal will set a DTC 41,

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 re-started and will run in the calculated sequential mode as long as the fault is present with a 1 and 6 chance of being correct.