BCU 002876.07 – S127 MultiFunction Lever Fault (Turn Signal). John Deere System Advisory.

BCU 002876.07 (BCU 2876.07)

Code: 002876.07

Shortcode: 2876.07


Error code BCU 002876.07 is activated when the Basic Control Unit (BCU) of a John Deere vehicle detects an unrealistic value from the multifunction lever, specifically related to the turn signal function. This diagnostic trouble code indicates a potential issue with the lever’s sensors, wiring, or the electronic interface that interprets the lever’s position or signal, which could compromise the turn signal’s reliability.


The system may respond to this fault by failing to correctly activate or deactivate the turn signals, or by exhibiting erratic signaling behavior, potentially affecting communication with other operators or vehicles and posing a safety risk.


  • Inspect the Multifunction Lever: Examine the multifunction lever for any physical damage or signs of wear that might affect its function. Ensure that it moves freely without any obstruction.
  • Check Electrical Connections: Look at all electrical connections related to the multifunction lever, including connectors and wiring. Check for loose connections, corrosion, or damaged wires that might be interfering with the signal integrity.
  • Test Lever Functionality: Use diagnostic tools to test the electrical signals being generated by the multifunction lever when the turn signal is activated. Ensure that the output matches what is expected for given inputs.
  • Replace Faulty Components: If the lever itself or any related components are found to be defective, replace them to restore proper function. This may include replacing sensors, the lever assembly, or associated circuitry.
  • Reset the BCU and Clear Diagnostic Codes: After repairs or component replacements, reset the BCU to ensure it recognizes the new configuration and clears any error codes. This reset will help verify that the issue is resolved.
  • Operational Test: After the reset, thoroughly test the turn signal function under various conditions to ensure it operates reliably and as expected without further issues.


Maintaining the functionality of vehicle control systems, such as the multifunction lever, is essential for safe operation. Regular checks and timely repairs of these systems can prevent potential hazards and ensure that communication signals like turn indicators work effectively, enhancing safety on the road and in the field. This proactive maintenance approach helps avoid misunderstandings and accidents caused by signal failures.