PTP 000168.03 – PTP Unswitched Supply Voltage High

PTP 000168.03 (PTP 168.03)

Code: 000168.03

Shortcode: 168.03


This error code is stored when the supply voltage to the PTP control unit exceeds 16.0 V for longer than 2.0 seconds. High voltage can damage electronic components and affect the performance of the control unit.


The control unit commands the transmission to neutral to prevent potential damage from high voltage.


  • Check Voltage Regulator:
    Inspect the voltage regulator for proper operation. Replace if it is malfunctioning and causing high voltage.
  • Inspect Alternator Output:
    Verify that the alternator is not overcharging the system. Adjust or replace the alternator as needed.
  • Electrical System Inspection:
    Examine the electrical system for any faults that could cause high voltage spikes, including wiring and connections.
  • Consult Technical Support:
    If the issue persists, consult technical support or the manufacturer for further assistance in diagnosing and resolving high voltage issues.


High supply voltage can lead to severe damage to the PTP control unit and other electronic components. Regular monitoring and maintenance of the electrical system are essential to prevent such issues.

Control Units: John Deere

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