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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 432 (ENGINE CONTROLS - SELF DIAGNOSTICS - 8.1L)PROGRAMMINGCRANKSHAFT POSITION SENSOR
2004 Oldsmobile Bravada AWD

Crankshaft Position Sensor

2004 Oldsmobile Bravada AWDSECTION Crankshaft Position Sensor
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Suburban, and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The Crankshaft Position (CKP) system variation learn procedure is required when the following service procedures have been performed, regardless of whether DTC P0315 is set:
  • CKP sensor replacement.
  • Engine replacement.
  • PCM replacement.
  • Harmonic balancer replacement.
  • Crankshaft replacement.
  • Any engine repairs which disturb the CKP sensor relationship.
For additional diagnostic information, see DTC P0315: CRANKSHAFT POSITION SENSOR VARIATION NOT LEARNED .
  1. Install a scan tool to Data Link Connector (DLC).
  2. With a scan tool, monitor the powertrain control module for DTCs. If only DTC P0315 is set, go to next step. If a DTC other than P0315 is set, diagnose that DTC first. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
  3. With a scan tool, select the CRANKSHAFT POSITION VARIATION LEARN PROCEDURE.
  4. The scan tool instructs you to perform the following:
    • Accelerate to Wide Open Throttle (WOT).
    • Release when the fuel cut-off occurs.
    • The engine should not accelerate beyond calibrated RPM value.
    • Release the throttle immediately if the value is exceeded.
    • Block the drive wheels.
    • Set the parking brake.
    • DO NOT apply the brake pedal.
    • Cycle the ignition from OFF to ON.
    • Apply and hold the brake pedal.
    • Start and idle the engine.
    • Turn the A/C OFF.
    • The vehicle must remain in Park or Neutral.
    • The scan tool monitors certain component signals to determine if all the conditions are met to continue with the procedure. The scan tool only displays the condition that inhibits the procedure. The scan tool monitors the following components:
      1. Crankshaft Position (CKP) sensors activity. If there is a CKP sensor condition, refer to the applicable DTC that set.
      2. Camshaft Position (CMP) sensor activity. If there is a CMP sensor condition, refer to the applicable DTC that set.
      3. Engine Coolant Temperature (ECT). If the ECT is not warm enough, idle the engine until the ECT reaches the correct temperature.
  5. Enable the crankshaft position system variation learn procedure with the scan tool.
    6. NOTE: While the learn procedure is in progress, release the throttle immediately when the engine starts to decelerate. The engine control is returned to the operator and the engine responds to throttle position after the learn procedure is complete.
  6. Accelerate to WOT.
  7. Release when the fuel cut-off occurs.
  8. The scan tool displays Learn Status: Learned this ignition. If the scan tool indicates that DTC P0315 ran and passed, the CKP variation learn procedure is complete. If the scan tool indicates DTC P0315 failed or did not run, refer to DTC P0315: CRANKSHAFT POSITION SENSOR VARIATION NOT LEARNED . If any other DTCs set, refer to DIAGNOSTIC TROUBLE CODE DEFINITIONS  for the applicable DTC that set.
  9. Turn OFF the ignition for 30 seconds after the learn procedure is completed successfully.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.