BCU 002023.09 – Incorrect CAN Bus Message from BIF. John Deere System Advisory.

BCU 002023.09 (BCU 2023.09)

Code: 002023.09

Shortcode: 2023.09


Error code BCU 002023.09 occurs when the Basic Control Unit (BCU) of a John Deere vehicle detects a problem in data transmission from the Body Interface Module (BIF). This diagnostic trouble code signifies that the reception of one or more CAN bus messages from the BIF is intermittent or completely absent, potentially due to issues such as loose wiring, connection faults, or other disruptions in the CAN bus network.


In response to these communication issues, the BCU may display warning indicators to the operator and potentially restrict certain vehicle functions that rely on data from the BIF, impacting the vehicle’s performance and the operator’s ability to control or monitor various system states effectively.


  • Inspect CAN Bus Wiring and Connections: Carefully check all connections and wiring associated with the CAN bus between the BCU and BIF. Look for signs of wear, damage, or looseness that could be impacting signal transmission.
  • Test CAN Bus Communication: Utilize diagnostic tools to assess the integrity and continuity of the communication links between the BCU and BIF. Identify any points of failure or intermittent signal issues that may be causing the errors.
  • Repair or Replace Faulty Wiring or Connectors: If any issues are found during the inspection, make the necessary repairs or replace damaged components to ensure a stable and secure connection.
  • Ensure BIF Functionality: Test the Body Interface Module to ensure it is functioning properly and not contributing to the problem by sending incomplete or corrupted data.
  • Reset the BCU and Clear Diagnostic Codes: After addressing the connection and hardware issues, reset the BCU to clear any fault codes and reestablish proper system settings. This step will also help verify that the issues have been resolved.
  • Monitor System Post-Repair: Keep a close watch on the system’s performance following the repairs to ensure that data transmission has been fully restored and that no further communication issues are observed.


Maintaining robust communication between the BCU and BIF is crucial for the optimal operation of vehicle body-related functions and overall system integration. Regular checks of the CAN bus system and immediate attention to any communication discrepancies can help prevent operational issues and ensure that the vehicle continues to perform efficiently and reliably. Ensuring that all electronic components are in good working order supports the long-term performance and reliability of John Deere equipment.