PLC 328012.31 – B84 Wheel Speed Sensor, Voltage Too High

PLC 328012.31 (PLC )

Code: 328012.31



This diagnostic trouble code is triggered when the control unit detects that the voltage at the signal input for the wheel speed sensor (B84) is too high, indicating a short to a supply lead or an open circuit.


The wheel speed sensor may provide inaccurate readings or fail to operate, affecting systems like ABS or traction control that rely on accurate speed information.


  • Inspect Wiring and Connections:
    • Check for any signs of damage, loose connections, or corrosion in the wiring and connections to the B84 wheel speed sensor. Repair or replace as needed.
  • Test the Sensor:
    • Ensure the wheel speed sensor is functioning correctly. Replace if necessary.
  • Check for Shorts and Opens:
    • Inspect the circuit for any potential shorts to a supply lead or open circuits and address the issues.
  • Secure Connections:
    • Make sure all connections are secure and clean.


Regular maintenance and checks can prevent issues related to high voltage in sensor circuits. Promptly addressing any signs of wear or damage can improve system reliability.

Control Units: John Deere

John Deere Parts
John Deere Logo