HCC 001873.03 – Rear Hitch Position Sensor Circuit Voltage High

HCC 001873.03 (HCC 1873.03)

Code: 001873.03

Shortcode: 1873.03


This error code indicates that the rear hitch position sensor voltage is out of range high, specifically above 4.75 volts. This could be due to a faulty sensor, wiring issues, or a malfunction in the control unit.


The HCC function is degraded when this error code is active.


  • Inspect Wiring and Connections:
    • Check the wiring and connections to the rear hitch position sensor for any damage, loose connections, or corrosion.
  • Test the Sensor:
    • Verify the sensor’s output voltage to confirm it is operating within the specified range.
  • Calibrate the Sensor:
    • Perform a calibration of the rear hitch position sensor following the manufacturer’s guidelines.
  • Replace Faulty Components:
    • If the sensor or wiring is found to be faulty, replace the defective components.
  • Consult Technical Support:
    • If the issue persists after these steps, contact technical support for further diagnostics and assistance.


Regular maintenance and calibration of the rear hitch position sensor are crucial for reliable operation and to prevent voltage-related issues.

Control Units: John Deere

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