Camshaft Position Sensor (3.1L & 3.4L)

On 3.1L, camshaft position sensor is located on timing cover, behind water pump, near camshaft sprocket. On 3.4L (VIN X), sensor is located on top of left cylinder head. As the camshaft sprocket turns, a magnet in it activates a Hall Effect switch in camshaft position sensor. This signal is generated whenever cylinder No. 1 is at TDC of its compression stroke.

This signal is used by PCM, in conjunction with the crankshaft position sensor and crankshaft sensor signals, to trigger the fuel injectors in sequential firing order. If sensor should fail while engine is running, engine will continue to run using the last calculated camshaft sensor signal to maintain sequential fuel injection mode. Upon restart, engine will run with a one in 6 chance of being correct.