PLC 328016.31 – B90 Park Lock Pressure Sensor, Voltage Too High

PLC 328016.31 (PLC )

Code: 328016.31



This diagnostic trouble code is triggered when the control unit detects a voltage exceeding 4.8 volts at the signal input for the park lock pressure sensor (B90), indicating a short to a supply lead somewhere in the circuit.


The park lock system may not function correctly, potentially leading to issues with the vehicle’s ability to remain securely parked.


  • Inspect Wiring and Connections:
    • Examine the wiring and connections to the B90 park lock pressure sensor for any damage, loose connections, or corrosion. Repair or replace as needed.
  • Test the Sensor:
    • Verify the operation of the park lock pressure sensor. Replace if faulty.
  • Check for Shorts:
    • Inspect the circuit for any shorts to a supply lead and address the issue.
  • Secure Connections:
    • Ensure all connections are clean, secure, and free from contamination.


Regular inspections and maintenance of sensor circuits can prevent high voltage issues and ensure the reliable operation of safety-critical systems like the park lock mechanism.

Control Units: John Deere

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