2002 Pontiac Firebird Formula, AutomaticFACTORY OEM SERVICE PROCEDURE

Crankshaft Position Sensor

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.
  1. Install a scan tool.
  2. Apply the parking brake.
  3. Block the drive wheels.
  4. Close the hood.
  5. Place the transmission in Park if the vehicle has an automatic transmission, or in Neutral if the vehicle has a manual transmission.
  6. Idle the engine until the engine coolant temperature reaches 150°F (66°C).
  7. Turn OFF all of the accessories.
  8. Apply the brakes for the duration of the procedure.
    9. NOTE: If the CKP System Variation Learn Procedure cannot be completed successfully, see DTC P0336: CRANKSHAFT POSITION SENSOR CIRCUIT PERFORMANCE  under DIAGNOSTIC TESTS.
  9. Use the scan tool in order to enable the Crankshaft Position System Variation Learn Procedure.
  10. Slowly raise the engine speed to 4,000 RPM.
  11. Immediately release the throttle when the engine speed decreases.
  12. Turn OFF the ignition for 15 seconds after the learn procedure is completed successfully.
Factory Service Tools

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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.

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