Crankshaft Position Sensor: Service and Repair

REMOVAL PROCEDURE

NOTE: In order to prevent damage to the crankshaft position sensor reluctor wheel/ring care must be used when removing or installing this component.




1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.
2. Disconnect the crankshaft position (CKP) sensor electrical connector.
3. Remove the fuel line bracket and bolt.
4. Use penetrating oil and allow the oil to soak around the CKP sensor prior to removing the sensor.




5. Remove the CKP sensor bolt.
6. Prior to removal of the CKP sensor, twist the sensor back and forth.
7. Remove the CKP sensor.




8. Inspect the CKP sensor for wear.

IMPORTANT: The CKP sensor is designed to contact the reluctor wheel of the crankshaft. Wear may be noticeable on the end of the sensor.

9. Normal CKP sensor wear will be shown on the wear strips (1) and no wear will be shown on the sensor sensing element (2).




10. Excessive or abnormal sensor wear will be shown on the sensing element (2).
11. If excessive/abnormal wear is present, replace the sensor.

INSTALLATION PROCEDURE




1. If reusing the old sensor, Inspect both O-rings for cuts, cracks, tears or damage, replace the O-rings as needed.
2. Lubricate the CKP sensor O-rings with clean engine oil.

IMPORTANT: Ensure that the CKP sensor is fully seated against the crankshaft reluctor ring. The upper flange on the sensor MAY NOT seat against the engine block.

3. Install the CKP sensor.

IMPORTANT: The CKP sensor bolt has adhesive applied to the threads. The adhesive may have come off during removal of the bolt. Ensure that the bolt hole is clean of any debris before installing the reinstalling bolt.

4. If reusing the old sensor, apply thread adhesive GM P/N U.S. 12345493, GM P/N Canada 10953488, or equivalent to the bolt threads.

NOTE: Refer to Fastener Notice in Service Precautions.

5. Install the CKP sensor bolt.

Tighten
Tighten the bolt to 12 N.m (106 lb in).




6. Connect the CKP sensor electrical connector.
7. Install the fuel line bracket and bolt.
8. Lower the vehicle.
9. Perform the CKP system variation learn procedure. Programming and Relearning