RPM 521926.17 – Time-Out When Engaging Range C

RPM 521926.17 (RPM )

Code: 521926.17



This diagnostic trouble code is generated if the control software detects that it takes too long to engage the range. The control software automatically attempts a second engagement.


When this error is detected, the control software will attempt to engage the range again automatically.


  • Inspect Transmission Mechanism:
    • Check the mechanical components of the transmission for signs of wear, damage, or misalignment that could be causing the delay. 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.
  • Update Control Software:
    • Ensure the control software is up-to-date. Install the latest software updates from the manufacturer to improve performance and engagement times.


Timely addressing of engagement delays can prevent further transmission issues. Regular maintenance and software updates are essential for optimal performance.

Control Units: John Deere

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