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Oldsmobile Aurora CKP Replacement

Q. Hi. I have a 2001 Oldsmobile Aurora. The Crankshaft Position Sensor is bad. Can you send me a picture of where it is located, or a description of where to find it?


Oldsmobile Aurora CKP Replacement


Here's the procedure for replacing the Crankshaft Position Sensor (CKP). I'm assuming the engine is a 3.5 liter V-6.
Oldsmobile Aurora CKP Replacement


  1. Disconnect the negative battery cable. CAUTION: Refer to Vehicle Lifting Caution in Service Precautions.
  2. Raise the vehicle.
  3. Loosen or remove the starter motor (1) as necessary.
  4. Disconnect the electrical connector from the Crankshaft Position (CKP) Sensor (2).
  5. Remove the CKP sensor mounting bolt (1).
  6. Remove the CKP sensor (2) from the engine block:

    • Remove the sensor by pulling on the sensor connector. Do not pry on the bracket.
    • Do not rotate or twist the sensor or damage the mounting bracket if the sensor is being reused.


IMPORTANT: When replacing the CKP sensor with a new sensor or reinstalling the original sensor, use the following recommended procedures:

  • Make sure that the CKP sensor bore is completely free of any foreign material, such as old O-ring, dirt, burrs, etc.
  • Make sure that the flange on the CKP sensor bore is not damaged.
  • Clean all the mounting surfaces before re-installing any components.
  • Inspect the CKP sensor and replace the sensor if any of the following conditions are present:
  • The bracket is damaged.
  • The bottom of the brass housing exhibits any damage.
  • Never install a sensor that has been dropped.
  • Lubricate the O-ring on the sensor with Amojell or clean engine oil prior to installing the sensor.
  • Check all the connectors for any damaged terminals.
Oldsmobile Aurora CKP Replacement
  1. Lubricate the CKP sensor O-ring.
  2. Install and fully seat the CKP sensor (2) into the engine block.
  3. Install the CKP sensor mounting bolt (1). Tighten the mounting bolt to 80 inch pounds.
  4. Ensure that the CKP sensor mounting flange is contacting the engine block.
  5. Connect the electrical connector to the CKP sensor (2).
  6. Re-install or tighten the starter motor (1) as necessary.
  7. Reconnect the negative battery cable.
  8. Lower the vehicle.
  9. The CKP System Variation Learn Procedure must be performed after replacing the CKP sensor. Even if the original sensor is reinstalled the Learn Procedure must be performed.

To do the CKP System Variation Learn Procedure you will need a scan tool.

IMPORTANT: The scan tool crankshaft position system variation learn function will be inhibited if the engine coolant temperature is less than 158°F. Allow the engine to warm to at least 158°F before attempting the Crankshaft Position System Variation Learn procedure.

The Crankshaft Position System Variation Learn function will be inhibited if any powertrain DTCs other than DTC P1336 are set before or during the Crankshaft Position System Variation Learn procedure. Diagnose and repair any DTCs, if set.

  1. Set the parking brake.
  2. Block the drive wheels.
  3. Close the hood.
  4. Start the engine and allow engine coolant temperature to reach at least 158°F.
  5. Turn off the engine, then turn the key to On.
  6. Select and enable the Crankshaft Position Variation Learn Procedure with the scan tool.
  7. Start the engine.
  8. Wait until instructed by the scan tool, then apply the brake pedal firmly.
  9. Ensure that the transaxle is in Park.
  10. Increase accelerator pedal position until the CKP System Variation Learn fuel cutoff is reached at 4,050 RPM . Release the accelerator pedal after the second fuel cutoff is reached.
  11. The crankshaft position system variation compensating values are learned when the RPM decreases back to idle. If the procedure terminates, refer to the Important above for instructions.
  12. Observe the DTC status for DTC P1336.
  13. If the scan tool indicates that DTC P1336 ran and passed, the Crankshaft Position System Variation Learn procedure is complete.
  14. Use the scan tool to clear any DTCs. DTC P1336 will not automatically clear after a successful learn procedure. DTC P1336 will not clear from memory if the learn procedure was unsuccessful.

If the scan tool indicates that DTC P1336 failed or did not run, recheck for other DTCs that may have set during the procedure. If no DTCs other than P1336 are set, repeat the Crankshaft Position System Variation Learn procedure. If the learn procedure will not pass, a mechanical engine problem may exist.

Additional Information provided courtesy of AllDATA

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