GPM 521935.12 – INFORMATION FOR OPERATOR: Range A Jumped Out

GPM 521935.12 (GPM )

Code: 521935.12



This code informs the operator that Range A has disengaged unexpectedly. The operator needs to re-engage Range A.


The control software will display a message instructing the operator to engage Range A again, causing a temporary disruption in operation. Limited or no function of the transmission may result.


  • Operator Action:
    • Follow the on-screen instructions to re-engage Range A.
  • Inspect Transmission:
    • Check the transmission system for any issues that might cause Range A to disengage unexpectedly. Look for signs of wear, damage, or improper adjustments.
  • Software Check:
    • Ensure the control software is functioning correctly and does not have any bugs that could cause this issue.
  • Consult Manual:
    • Refer to the operator’s manual for specific instructions on engaging Range A and troubleshooting this issue.


Training operators on the proper engagement of ranges and regular inspection of the transmission system can help prevent this issue.

Control Units: John Deere

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