Camshaft Position Sensor

A separate Hall Effect camshaft position sensor is used on 3.8L C(3)I-equipped models, while 3.3L C(3)I-equipped models use a combination cam and crank Hall Effect sensor. The cam sensor provides ECM with a TDC No. 1 signal used to compute the exact position of valves. This allows ECM to properly time ignition and fuel injection operation on PFI and SFI-equipped models. A fault in the cam sensor circuit (no cam sensor signal) will result in a no-start condition and should set a Code 41.