BCU 001873.15 – Hitch Position Sensor High Voltage During Calibration. John Deere System Advisory.

BCU 001873.15 (BCU 1873.15)

Code: 001873.15

Shortcode: 1873.15


Error code BCU 001873.15 occurs when the Basic Control Unit (BCU) of a John Deere vehicle detects excessive voltage at the hitch position sensor during the calibration process. This high voltage reading can indicate a malfunction within the sensor circuit or related components, potentially leading to inaccurate hitch position calibration which could affect the operational accuracy and efficiency of the hitch system.


The BCU may halt the calibration process and signal an error to prevent the completion of calibration under potentially damaging conditions. This ensures that incorrect settings do not affect the hitch’s performance and the overall safety of the vehicle.


  • Inspect Hitch Position Sensor and Related Wiring: Carefully examine the hitch position sensor and its associated wiring for signs of damage, corrosion, or improper connections that could lead to high voltage readings.
  • Measure and Test Voltage Levels: Utilize a multimeter to measure the voltage levels at the sensor during the calibration process. Ensure these levels are within the manufacturer’s specified range.
  • Identify and Correct Circuit Issues: Look for potential issues in the circuit, such as shorts to power or incorrect wiring, that could be causing the excessive voltage. Repair or replace faulty wiring or components as needed.
  • Replace Faulty Hitch Position Sensor: If the sensor itself is found to be faulty and contributing to high voltage readings, replace it to ensure it functions correctly during calibration and normal operation.
  • Re-Calibrate the Hitch System: Once any necessary repairs have been made, perform the hitch calibration again to ensure that the hitch position sensor accurately reflects the hitch’s actual position.
  • Reset the BCU and Clear Diagnostic Codes: After addressing the issue and recalibrating the hitch, reset the BCU to clear any stored codes and verify that the system operates without triggering further high voltage alerts.


Regular maintenance and calibration of the hitch position sensor are crucial for optimal performance of the hitch system. Keeping electrical components and sensors in good working condition is essential for accurate operation, particularly in precision agricultural applications where hitch positioning can impact operational effectiveness and crop yields.