WOMS
P code powertrain Medium severity

P2765 Input/Turbine Speed Sensor "B" Circuit

The OBD2 code P2765 indicates a problem with the Input/Turbine Speed Sensor "B" circuit, which typically relates to issues in the sensor's performance or its electrical circuit, affecting the transmission's ability to...

Definition

The OBD2 code P2765 indicates a problem with the Input/Turbine Speed Sensor "B" circuit, which typically relates to issues in the sensor's performance or its electrical circuit, affecting the transmission's ability to determine the input speed accurately

Common causes

  • Faulty input/turbine speed sensor "B"
  • Damaged wiring or connectors
  • Poor electrical connections
  • Transmission fluid issues (low level, contamination)
  • Faulty transmission control module (TCM)
  • Malfunctioning transmission valve body
  • Internal transmission problems

Common misdiagnoses

  • Faulty transmission control module (TCM)
  • Incorrectly diagnosed transmission failure
  • Faulty input/turbine speed sensor "A"
  • Wiring issues or shorts in the sensor circuit
  • Low transmission fluid levels or contamination
  • Faulty torque converter
  • Misdiagnosed engine performance issues
  • Incorrectly diagnosed vehicle speed sensor (VSS) issues

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. This can provide more context and help identify related issues

  2. 2. Inspect Wiring and Connectors

    Visually inspect the wiring and connectors associated with the Input/Turbine Speed Sensor "B." Look for signs of damage, corrosion, or loose connections

  3. 3. Ensure that the wiring is not pinched, frayed, or exposed to heat sources

  4. 4. Test the Sensor

    Use a multimeter to test the Input/Turbine Speed Sensor "B." Check the resistance and voltage output according to the manufacturer's specifications

  5. 5. If the sensor is out of specification, it may need to be replaced

  6. 6. Check the Sensor Circuit

    Inspect the circuit for continuity. Use a multimeter to check for continuity between the sensor and the ECM

  7. 7. Look for any shorts to ground or power that could affect the sensor's operation

  8. 8. Inspect the Transmission Fluid

    Check the transmission fluid level and condition. Low or dirty fluid can affect sensor performance and transmission operation

  9. 9. If the fluid is contaminated, consider performing a transmission fluid change

  10. 10. Check for Mechanical Issues

    Inspect the transmission for any mechanical issues that could affect the operation of the Input/Turbine Speed Sensor. This includes checking for proper engagement of gears and any signs of internal damage

  11. 11. Clear the Code and Test Drive

    After performing any repairs or replacements, clear the trouble codes using the OBD-II scanner

  12. 12. Take the vehicle for a test drive to see if the code returns. Monitor the transmission's performance during the drive

  13. 13. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the P2765 code for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  14. 14. Seek Professional Help

    If the issue persists after performing the above steps, consider seeking help from a qualified mechanic or transmission specialist. They may have access to advanced diagnostic tools and experience with specific vehicle issues. By following these troubleshooting steps, you can systematically identify and resolve the issue related to the P2765 code