PTR 003509.04 – PTR Sensor Supply Voltage Low

PTR 003509.04 (PTR 3509.04)

Code: 003509.04

Shortcode: 3509.04


This error code, PTR 003509.04, indicates that the Power Train Reverser (PTR) control unit has detected that the sensor supply voltage is lower than 4.8 V for longer than 2 seconds. This can occur due to issues with the voltage regulator, wiring problems, or sensor faults.


When this error is detected, the PTR control unit may disable or limit the functionality of the affected sensors to prevent damage. The system may also display a warning message to alert the operator.


Inspect Voltage Regulator:

  • Check the voltage regulator for proper operation.
  • Ensure it is providing a stable and correct voltage output. Replace if necessary.

Check Wiring and Connections:

  • Inspect the wiring and connectors related to the sensor supply voltage.
  • Ensure all connections are secure and free from corrosion or damage.

Test Voltage Circuitry:

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

Examine Sensors:

  • Verify that all connected sensors are functioning correctly and are within their operating voltage range.
  • Replace any sensors that may be contributing to the low voltage issue.

Update Software:

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

Monitor Sensor Voltage:

  • After addressing the issue, monitor the sensor supply voltage during operation.
  • Ensure that the voltage remains within the specified range.


Maintaining proper sensor supply voltage is crucial for accurate sensor readings and overall system performance. Regular inspection and maintenance of the voltage regulator and related components can help prevent such issues.

Control Units: John Deere

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