Ninety-Eight V6-3800 3.8L (1989)
Camshaft Position Sensor: Description and Operation
Camshaft Position (CMP) Sensor
The cam 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 sensor. When the Hall-effect switch is activated, it grounds the signal line to the ECM, pulling the cam signal
line's applied voltage low. This is interpreted as a cam signal. The cam signal is created as piston #1 is approximately 25° after top dead center on the
power stroke. When the cam signal is not received by the ECM, a Code 41 will set.
