BCU 524224.31 – Information for Operator: Rear PTO Was Switched On When Engine Was Started. John Deere Advisory.

BCU 524224.31 (BCU )

Code: 524224.31



Diagnostic trouble code BCU 524224.31 is an informational alert generated to notify the operator that the rear PTO (Power Take-Off) was found to be switched on at the time the engine was started (ignition ON). This code is issued to highlight a potential oversight or safety concern, as operating the PTO during engine start-up can pose risks to both the machinery and personnel.


The system itself does not take direct action to disable the PTO; instead, it relies on the operator to address the issue. The alert serves to ensure that operators are aware of the PTO status and can take appropriate action to secure the equipment before beginning operation.


  • Manual Verification and Adjustment: Immediately verify the status of the rear PTO and switch it off if it is not required immediately upon starting the engine. Ensure that all equipment attached to the PTO is secured and that it is safe to operate or deactivate the PTO.
  • Review Safety Procedures: Operators should be familiar with the proper procedures for engaging and disengaging the PTO. These procedures typically recommend that the PTO be off during engine start-up unless specifically required for the operation.
  • Operator Training: Reinforce training for all operators on the importance of checking PTO settings before starting the engine to prevent unintended machinery activation and potential safety hazards.
  • Reset Diagnostic Codes: After addressing the issue, reset any diagnostic codes triggered by this scenario to clear the system’s error log.
  • Regular Maintenance Checks: Include checks for proper PTO linkage and activation settings in your regular maintenance routines to prevent similar alerts in the future.


Ensuring that the PTO is off before engine start-up is a critical safety measure in agricultural machinery operation. Regular training and adherence to safety protocols are essential to prevent accidents and ensure efficient operation of the machinery. Keeping abreast of operational protocols and system alerts can significantly enhance safety and operational efficiency.

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