SSU 001807.02 – B138 Steering Wheel Position Sensor, Calibration Error

SSU 001807.02 (SSU 1807.02)

Code: 001807.02

Shortcode: 1807.02


This diagnostic trouble code (DTC), SSU 001807.02, is triggered when false signals are sent to the SSU control unit during the calibration of steering input devices SID 1 or SID 2. This indicates a calibration error in the steering wheel position sensor.


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


Verify Calibration Procedure:

  • Ensure that the correct calibration procedure is being followed for SID 1 and SID 2. Refer to the manufacturer’s guidelines for proper calibration steps.

Inspect Steering Wheel Position Sensor:

  • Check the steering wheel position sensor for any signs of damage or malfunction.
  • Ensure the sensor is securely mounted and properly connected.

Check for Interference:

  • Ensure that there are no sources of electrical interference near the steering wheel position sensor that could be causing false signals.

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 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 calibration errors.
  • Accurate calibration of steering input devices is crucial for reliable steering performance.

Control Units: John Deere

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