WOMS
U code network High severity

U2967 Lost Communication with the Hybrid Powertrain Control Module (HPCM) A

The OBD2 code U2967 indicates a loss of communication with the Hybrid Powertrain Control Module (HPCM) A, suggesting that the vehicle's diagnostic system is unable to communicate with this specific module, which may...

Definition

The OBD2 code U2967 indicates a loss of communication with the Hybrid Powertrain Control Module (HPCM) A, suggesting that the vehicle's diagnostic system is unable to communicate with this specific module, which may affect hybrid system performance

Common causes

  • Faulty Hybrid Powertrain Control Module (HPCM)
  • Damaged or corroded wiring or connectors
  • Poor ground connections
  • Communication network issues (CAN bus problems)
  • Faulty or disconnected sensors
  • Software or firmware issues in the HPCM
  • Battery or power supply issues affecting the HPCM

Common misdiagnoses

  • Faulty Hybrid Powertrain Control Module (HPCM)
  • Wiring issues or damaged connectors
  • Faulty Engine Control Module (ECM)
  • Battery or power supply issues
  • Faulty communication network (CAN bus issues)
  • Corrupted software or firmware in control modules
  • Faulty sensors related to the hybrid system
  • Grounding issues in the electrical system

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 the Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors related to the HPCM for any signs of damage, corrosion, or loose connections

  3. 3. Connector Pins

    Ensure that the pins in the connectors are not bent, corroded, or damaged

  4. 4. Check Power and Ground

    Power Supply: Verify that the HPCM is receiving the correct voltage. Use a multimeter to check the power supply to the module

  5. 5. Ground Connections

    Ensure that the ground connections for the HPCM are secure and free of corrosion

  6. 6. Inspect the HPCM

    If possible, check the HPCM itself for any signs of physical damage or water intrusion

  7. 7. Ensure that the module is securely mounted and that there are no loose connections

  8. 8. Test Communication Lines

    Use a scan tool to check for communication with the HPCM. If the module is not responding, it may indicate a communication issue

  9. 9. Check the CAN (Controller Area Network) bus lines for continuity and proper resistance

  10. 10. Check for Interference

    Look for any aftermarket accessories or modifications that may interfere with the communication lines or power supply to the HPCM

  11. 11. Perform a Hard Reset

    Disconnect the vehicle's battery for a few minutes to reset the vehicle's systems. Reconnect and see if the code reappears

  12. 12. Update Software/Firmware

    Check if there are any software updates available for the HPCM or the vehicle’s ECU. Sometimes, communication issues can be resolved with a software update

  13. 13. Replace the HPCM

    If all other steps have been exhausted and the HPCM is still unresponsive, it may be necessary to replace the module. Ensure that the replacement is compatible with your vehicle

  14. 14. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the HPCM or communication issues for your specific vehicle make and model. Manufacturers may have specific fixes or recommendations.1

  15. 15. Seek Professional Help

    If you are unable to resolve the issue, consider seeking assistance from a qualified technician or dealership, especially if the vehicle is under warranty.Conclusion Troubleshooting OBD-II code U2967 involves a systematic approach to check for wiring issues, power supply, communication integrity, and the condition of the HPCM itself. Following these steps can help identify the root cause of the communication loss and guide you toward a resolution