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P1867 Transmission Transfer Case Contact Plate General Circuit Failure

The OBD2 code P1867 indicates a general circuit failure in the transmission transfer case contact plate, which is responsible for monitoring and controlling the transfer case functions in a vehicle's drivetrain

Definition

The OBD2 code P1867 indicates a general circuit failure in the transmission transfer case contact plate, which is responsible for monitoring and controlling the transfer case functions in a vehicle's drivetrain

Common causes

  • Faulty contact plate
  • Wiring issues (shorts or open circuits)
  • Poor connections or corroded terminals
  • Malfunctioning transfer case control module
  • Low transmission fluid levels
  • Faulty sensors in the transfer case
  • Electrical interference or shorts in the circuit
  • Damaged or worn transfer case components

Common misdiagnoses

  • Transmission Control Module (TCM) failure
  • Faulty wiring or connectors
  • Transmission fluid issues
  • Transfer case motor failure
  • Shift solenoid problems
  • Incorrectly calibrated or faulty speed sensors
  • Engine control module (ECM) issues
  • Mechanical transmission problems
  • Transfer case fluid contamination
  • Faulty or worn transfer case components

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes. Addressing any additional codes may help in diagnosing the problem

  2. 2. Inspect Wiring and Connectors

    Visually inspect the wiring and connectors associated with the transfer case contact plate. Look for signs of damage, corrosion, or loose connections

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

  4. 4. Test the Contact Plate

    If accessible, test the contact plate for continuity and proper operation. This may involve checking resistance values or using a multimeter to ensure it is functioning correctly

  5. 5. If the contact plate is damaged or malfunctioning, it may need to be replaced

  6. 6. Check for Ground Issues

    Ensure that the ground connections for the transfer case and contact plate are secure and free of corrosion. Poor grounding can lead to circuit failures

  7. 7. Inspect the Transfer Case

    Check the transfer case for any signs of physical damage or internal issues. If the transfer case is malfunctioning, it may affect the contact plate's operation

  8. 8. Examine the Control Module

    Inspect the transmission control module (TCM) or transfer case control module (TCCM) for any faults. A malfunctioning control module can lead to incorrect readings and trigger the P1867 code

  9. 9. Perform a Visual Inspection

    Look for any signs of fluid leaks around the transfer case, which could indicate a problem that might affect the contact plate

  10. 10. Clear Codes and Test Drive

    After performing inspections and repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

  11. 11. Seek Professional Help

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with transmission and transfer case issues. By following these troubleshooting steps, you can systematically identify and address the underlying cause of the P1867 code