PTR 521233.05 – High Valve Driver Fault

PTR 521233.05 (PTR 233.05)

Code: 521233.05

Shortcode: 233.05


This error code, PTR 521233.05, is generated by the Power Train Reverser (PTR) control unit when it detects that the Hi/Lo solenoid driver status line has an open circuit, short to ground, or is experiencing over temperature conditions. This can occur due to wiring issues, solenoid faults, or problems within the control circuitry.


When this error is detected, the PTR control unit may disable the Hi/Lo solenoid functionality to prevent further damage. The system may also display a warning message to alert the operator.


Inspect Hi/Lo Solenoid:

  • Check the Hi/Lo solenoid for proper operation.
  • Ensure the solenoid is not damaged, stuck, or overheating. Replace if necessary.

Check Wiring and Connections:

  • Inspect the wiring and connectors related to the Hi/Lo solenoid driver status line.
  • Ensure all connections are secure and free from corrosion, damage, or short circuits.

Test Driver Circuitry:

  • Use a multimeter to test the driver circuitry for the Hi/Lo solenoid.
  • Ensure there are no open circuits, short circuits, or other electrical issues causing the fault.

Examine Control Unit:

  • Verify that the PTR control unit is functioning correctly.
  • Check for any diagnostic trouble codes in the control unit that might relate to the solenoid driver status.

Update Software:

  • Ensure that the PTR control unit software is up-to-date.
  • Apply any available software updates or patches from the manufacturer.

Monitor Solenoid Operation:

  • After addressing the issue, monitor the Hi/Lo solenoid operation during use.
  • Ensure that the solenoid driver functions as intended and does not experience further faults.


Proper functioning of the solenoid drivers is critical for the transmission’s performance. Regular inspection and maintenance of the solenoids and related components can help prevent such issues.

Control Units: John Deere

John Deere Parts
John Deere Logo