WOMS
P code powertrain Medium severity

P0908 Gate Select Position Circuit Intermittent

The OBD2 code P0908 indicates an intermittent issue with the gate select position circuit, which is responsible for detecting the position of the gear selector in a vehicle's transmission system

Definition

The OBD2 code P0908 indicates an intermittent issue with the gate select position circuit, which is responsible for detecting the position of the gear selector in a vehicle's transmission system

Common causes

  • Faulty gate select position sensor
  • Wiring issues (shorts, opens, or corrosion)
  • Poor electrical connections
  • Malfunctioning transmission control module (TCM)
  • Software issues or glitches in the TCM
  • Mechanical issues in the gate select mechanism
  • Intermittent faults in the sensor circuit

Common misdiagnoses

  • Transmission Control Module (TCM) failure
  • Faulty transmission range sensor
  • Wiring issues or shorts in the circuit
  • Malfunctioning gear shift lever
  • Defective clutch position sensor
  • Incorrectly calibrated or faulty throttle position sensor
  • Issues with the vehicle's computer or software glitches
  • Problems with the neutral safety switch

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. Addressing any related codes can help in diagnosing the issue

  2. 2. Inspect Wiring and Connectors

  3. 3. Visually inspect the wiring and connectors associated with the gate select position sensor. Look for signs of damage, corrosion, or loose connections

  4. 4. Ensure that all connectors are securely attached and free of dirt or moisture

  5. 5. Test the Gate Select Position Sensor

  6. 6. Use a multimeter to test the resistance and voltage output of the gate select position sensor. Compare the readings to the specifications provided in the vehicle's service manual

  7. 7. If the sensor is faulty, it may need to be replaced

  8. 8. Check for Ground Issues

  9. 9. Ensure that the ground connections for the gate select position circuit are secure and free of corrosion. A poor ground can lead to intermittent issues

  10. 10. Inspect the Transmission Control Module (TCM)

  11. 11. Check for any signs of damage or malfunction in the TCM. If the TCM is not functioning correctly, it may misinterpret signals from the gate select position sensor

  12. 12. Look for Mechanical Issues

  13. 13. Inspect the transmission linkage and components for any mechanical binding or misalignment that could affect the gate select position

  14. 14. Clear the Codes and Test Drive

  15. 15. After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner. Take the vehicle for a test drive to see if the code reappears

  16. 16. Consult Technical Service Bulletins (TSBs)

  17. 17. Check for any TSBs related to the P0908 code for your specific vehicle make and model. Manufacturers may have issued guidance or fixes for known issues

  18. 18. Professional Diagnosis

  19. 19. If the issue persists after performing the above steps, consider seeking help from a qualified mechanic or dealership. They may have access to specialized diagnostic tools and experience with your specific vehicle. By following these troubleshooting steps, you can systematically identify and resolve the underlying issue causing the P0908 code