PTF 523665.04 – Control Software, Supply Voltage (BAT) Too Low

PTF 523665.04 (PTF )

Code: 523665.04



This error code is triggered when the supply voltage (BAT) drops below 9 V. This undervoltage condition can impair or completely halt the functioning of the control software.


When this code is detected, the control software may exhibit limited or no functionality.


  • Inspect Power Supply:
    • Ensure the power supply is providing sufficient voltage.
    • Check the voltage regulator for proper operation.
  • Examine Wiring and Connections:
    • Look for damaged wires, loose connections, or signs of corrosion.
    • Repair or replace any defective components.
  • Check Battery Health:
    • Verify the battery’s condition and charge level.
    • Replace the battery if it is old or unable to hold a charge.
  • Avoid Power Drains:
    • Ensure there are no devices or components causing excessive power drain.


Undervoltage can significantly impact control software performance. Regular maintenance and monitoring of the power supply can prevent these issues.

Control Units: John Deere

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