SSU 001807.03 – B138 Steering Wheel Position Sensor, Supply Voltage in Channel 1 Too High

SSU 001807.03 (SSU 1807.03)

Code: 001807.03

Shortcode: 1807.03


This diagnostic trouble code (DTC), SSU 001807.03, is triggered when the power supply for the steering wheel position sensor SID 1 exceeds 5.25 volts for longer than 320 milliseconds. This indicates an overvoltage condition in the steering wheel position sensor’s power supply.


When this error is detected, the steering system may not function correctly, potentially leading to inaccurate steering input and compromised vehicle control.


Inspect Power Supply:

  • Check the power supply to the steering wheel position sensor SID 1 for proper voltage regulation.
  • Ensure that the voltage does not exceed 5.25 volts.

Verify Sensor Connections:

  • Inspect the wiring and connectors related to the steering wheel position sensor SID 1 for signs of damage, loose connections, or corrosion.
  • Ensure all connections are secure and free from contaminants.

Update Software:

  • Ensure that the software related to the steering system is up-to-date. Apply any available firmware updates to improve system performance and compatibility.

Replace Faulty Components:

  • If the steering wheel position sensor SID 1 or related components are found to be defective, replace them with new, genuine parts.

Consult Technical Support:

  • If the error persists after performing the above steps, consult technical support or the manufacturer for further assistance.


  • Regular maintenance and inspection of the steering system components can help prevent overvoltage conditions.
  • Ensuring the electrical system is properly regulated can avoid damage to sensitive components.

Control Units: John Deere

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