PTR 524020.31 – Reverser in Gear at Power-Up

PTR 524020.31 (PTR )

Code: 524020.31



This error code, PTR 524020.31, indicates that the Power Train Reverser (PTR) control unit has detected that the left-hand reverser lever is not in the neutral position at power-up. This can occur due to operator error, mechanical issues with the lever, or sensor malfunctions.


When this error is detected, the PTR control unit may prevent the vehicle from starting or engaging the transmission until the reverser lever is moved to the neutral position. The system may also display a warning message to alert the operator.


Inspect Reverser Lever:

  • Check the left-hand reverser lever for proper operation.
  • Ensure the lever moves smoothly and accurately into the neutral position. Repair or replace if necessary.

Check Neutral Position Sensor:

  • Inspect the sensor that detects the neutral position of the reverser lever.
  • Ensure the sensor is clean, correctly aligned, and free from damage. Replace if necessary.

Verify Wiring and Connections:

  • Inspect the wiring and connectors related to the reverser lever and neutral position sensor.
  • Ensure all connections are secure and free from corrosion, damage, or short circuits.

Test Sensor Circuitry:

  • Use a multimeter to test the sensor circuitry for proper functionality.
  • Ensure there are no short circuits or open circuits causing incorrect signals.

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 neutral position detection system.

Update Software:

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

Monitor Lever Operation:

  • After addressing the issue, monitor the reverser lever operation during use.
  • Ensure that the lever is detected accurately in the neutral position at power-up and during operation.


Accurate detection of the neutral position is essential for safe and proper vehicle start-up. Regular inspection and maintenance of the reverser lever and related sensors can help prevent such issues.

Control Units: John Deere

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