Grand AM L4-144 2.4L DOHC VIN T SFI (1997)
Crankshaft Position Sensor: Description and Operation
Crankshaft Position (CKP) Sensor(s)
Description
The Crankshaft Position (CKP) sensor provides a signal to the electronic Ignition Control Module (ICM), which the PCM uses as a reference to
calculate RPM and crankshaft position.
Important: A Crankshaft Position System Variation Learning Procedure must be performed any time a change is made to the crankshaft sensor to
crankshaft relationship. Changing the crankshaft sensor to crankshaft relationship will not allow the PCM to detect misfire at all speeds and loads
accurately which can result in a possible false misfire DTC being set. Removing a part for inspection and then reinstalling the same part is considered a
disturbance. A false DTC P0300 could be set if this procedure is not performed. Refer to Service and Repair.
Circuit Faults
A fault in the CKP sensor circuits will cause a DTC P0335.
