RPM 521926.07 – Range C Fault

RPM 521926.07 (RPM )

Code: 521926.07



This diagnostic trouble code is generated if the control software detects that after several attempts, the range cannot be engaged. This indicates a mechanical problem with the transmission. The range is disabled until the next tractor start-up.


When this error is detected, the transmission may experience limited or no function, as the range will be disabled.


  • Inspect Transmission Mechanism:
    • Check the mechanical components of the transmission for signs of wear, damage, or misalignment. Repair or replace any faulty components.
  • Verify Solenoid Operation:
    • Ensure the Range C solenoid is functioning correctly. Test the solenoid and replace it if necessary.
  • Check Hydraulic System:
    • Inspect the hydraulic system that controls the range engagement for any issues. Ensure there are no leaks and that the hydraulic pressure is within the specified range.
  • Reset Control Software:
    • Restart the tractor to reset the control software and attempt to engage the range again.
  • Consult Technical Support:
    • If the error persists, consult John Deere technical support or a certified technician for further diagnosis and resolution.


Regular maintenance of the transmission and its components is crucial for preventing mechanical failures. Addressing any mechanical issues promptly can prevent range engagement problems.

Control Units: John Deere

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