LeSabre V6-231 3.8L VIN C SFI (1990)
Camshaft Position Sensor: Description and Operation
Camshaft Position (CMP) Sensor
Camshaft Sensor
The cam shaft sensor is located on the timing cover behind the water pump near the camshaft sprocket. As the camshaft sprocket turns, a permanent
magnet activates the Hall-Effect switch in the cam shaft sensor. When the Hall-effect switch is activated, it grounds the signal line to the ECM, pulling
the camshaft signal line's applied voltage low. This is interpreted as a cam shaft signal. The camshaft signal is created as piston #1 is approximately 25°
After Top Dead Center on the power stroke. When the cam shaft signal is not received by the ECM, a Code 41 will set.
