ECU 004795.31 – DPF Missing. John Deere System Advisory.

ECU 004795.31 (ECU 4795.31)

Code: 004795.31

Shortcode: 4795.31


This diagnostic code is triggered when the ECU detects that the Diesel Particulate Filter (DPF) is missing. The DPF is a crucial component of the exhaust aftertreatment system, responsible for trapping and reducing particulate matter emissions.


The ECU may limit engine performance or take other preventive measures to manage the absence of the DPF, significantly impacting vehicle performance and emissions compliance.


  • Verify DPF Installation: Ensure that the DPF is installed correctly in the vehicle. If it is missing, replace it immediately.
  • Inspect Exhaust System: Check the exhaust system for any modifications or tampering that might have led to the removal of the DPF.
  • Check for Faulty Sensors: Ensure that the sensors responsible for detecting the DPF are functioning correctly. Replace any faulty sensors.
  • Educate Operators: Ensure that vehicle operators are aware of the importance of the DPF and the legal implications of its removal.
  • Reset ECU and Monitor System: After reinstalling the DPF or resolving the issue, reset the ECU to clear the fault code and monitor the system to ensure proper operation.


The DPF is essential for reducing particulate emissions and ensuring compliance with environmental regulations. Removing or tampering with the DPF can lead to significant legal and performance issues. Regular maintenance and inspections can help ensure the DPF remains in place and functions correctly.

Control Units: John Deere

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