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HOMESERVICE MANUALSGMC2001SONOMA 2D PICKUP, 2.2 5, AUTOMATICREPAIR AND DIAGNOSISGENERAL INFORMATIONCOMPUTER RELEARN PROCEDURESGENERAL MOTORS (TRUCKS & VANS)MONTANA, SILHOUETTE & VENTURECRANKSHAFT POSITION (CKP) SENSOR VARIATION LEARN PROCEDURE
2001 GMC Sonoma 2D Pickup, 2.2 5, Automatic

Crankshaft Position (CKP) Sensor Variation Learn Procedure

2001 GMC Sonoma 2D Pickup, 2.2 5, AutomaticSECTION Crankshaft Position (CKP) Sensor Variation Learn Procedure
  1. Procedure must be performed if any of following have been done or exist:
    • EEPROM was reprogrammed.
    • If DTC P1336 exists.
    • If crankshaft, CKP sensor, engine, PCM or vibration damper have been replaced.
  2. CKP sensor variation compensating values are stored in PCM after a learn procedure has been performed. If actual CKP sensor values are not within specification, DTC P0300 will be stored.
  3. Using scan tool, check for stored DTCs. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If no DTCs exist, or if DTC P1336 exists, go to next step. If any DTCs exist except for P1336, perform test procedures for specified DTC and repair as necessary. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. Ensure all DTCs are learned from PCM, then go to next step.
  4. Ensure ignition is off. Apply parking brakes. Block front wheels. Ensure hood is closed. Start and warm engine until engine coolant temperature is at least 158°F (70°C). Turn ignition switch to OFF position.
    NOTE: Ensure engine coolant temperature is at least 158°F (70°C) before performing CKP sensor variation learn procedure.
  5. Using scan tool, select and enable CKP sensor variation learn procedure. Start engine. Apply service brakes. Ensure transaxle is in Park.
  6. Accelerate engine until CKP sensor variation learn procedure fuel cut-off is obtained at 5150 RPM. Quickly release throttle to idle position once CKP sensor variation learn procedure fuel cut-off is obtained and engine starts to decelerate. Once CKP sensor variation values are learned, PCM will return engine control to operator and engine will respond to throttle position.
    CAUTION: Ensure throttle is quickly released to idle position once CKP sensor variation learn procedure fuel cut-off is obtained.
  7. If CKP sensor variation learn procedure was not terminated, go to next step. If CKP sensor variation learn procedure was terminated, this may be caused by PCM detecting a problem in CAM signal setting DTC P0341 or a problem in 3X crank signal setting DTC P1374, or a problem in the 3X or 24X crank signal setting DTC P0336. Using scan tool, check for stored DTCs. Perform test procedures for specified DTCs and repair as necessary. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
  8. Check status of DTC P1336 on scan tool. If scan tool indicates DTC P1336 ran and passed, CKP sensor variation learn procedure fuel cut-off is complete. If scan tool indicates that DTC P1336 failed or was not run, check for any other DTCs. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If any other DTCs exist, perform test procedures for specified DTC and repair as necessary. If no other DTCs exist, repeat CKP sensor variation learn procedure.
RENDER: 1.0x

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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.