PTP 524273.05 – A Brake (AB) Valve Circuit Fault

PTP 524273.05 (PTP )

Code: 524273.05



This error code is stored when the PTP control unit detects a circuit fault in the A Brake (AB) valve during shifting into gear. This indicates a potential issue with the valve circuit.


The control unit commands the transmission to neutral to prevent potential damage.


  • Inspect Solenoid and Wiring:
    Check the AB solenoid and its wiring for any signs of damage, wear, or loose connections. Repair or replace as necessary.
  • Test Solenoid Function:
    Verify that the AB solenoid is operating correctly. Replace if it is faulty.
  • Check Electrical Connections:
    Ensure all electrical connections related to the AB valve are secure and free from corrosion.
  • Measure Circuit Current:
    Use diagnostic tools to measure the current in the AB valve circuit and ensure it is within the specified range.
  • Consult Technical Support:
    If the issue persists, consult technical support or the manufacturer for further assistance.


Maintaining the proper function of the AB valve circuit is essential for reliable brake operation and overall vehicle performance. Regular inspections and prompt repairs can help prevent related issues.

Control Units: John Deere

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