John Deere ECU004766.17 – ECU: Cleaning System Fault

The system has detected a fault in the exhaust filter system (aftertreatment system), preventing the Diesel Particulate Filter (DPF) cleaning process (regeneration) from continuing. When this fault occurs, active exhaust filter cleaning becomes unavailable, which will lead to a significant reduction in engine power (derate) and eventual loss of machine availability if operation continues.

• Tractors
• Combines
• Forage Harvesters
• Sullair air compressors
• Equipment with Interim Tier 4 (IT4) or newer engines

1. 1

   Cycle the key switch off and on to see if the fault clears

2. 2

   Review the Operator's Manual for specific exhaust filter cleaning modes and indicators

3. 3

   Check the machine's display for other active diagnostic trouble codes (DTCs) related to temperature sensors, pressure sensors, or the fuel dosing system, which can prevent successful regeneration

4. 4

   Verify operating conditions to ensure the machine is not being subjected to prolonged periods of idling or light-load operation

5. 5

   Confirm that only ultra-low sulfur diesel fuel and manufacturer-recommended low-ash engine oil are being used

6. 6

   Visually inspect the exhaust filter housing and associated wiring for obvious signs of damage, corrosion, or loose connections

1. 1

   Initiate a parked regeneration

   Park the machine in a safe, outdoor location away from flammable materials. Engage the park brake, place the transmission in neutral or park, and disengage the PTO. Ensure the engine is running at low idle, is at operating temperature, and has adequate fuel for a 30 to 45+ minute process.

2. 2

   Follow on-screen prompts

   Using the machine's control interface (e.g., CommandCenter or display panel), navigate to the exhaust filter cleaning menu and select the option for a parked regeneration. This usually involves pressing and holding a specific button for several seconds.

3. 3

   Monitor the process

   The engine RPM will elevate, and the High Exhaust System Temperature (HEST) indicator will illuminate. Do not interrupt the process unless there is an emergency. The system should return to idle once the cleaning cycle is complete.

4. 4

   Perform post-regeneration check

   After the regeneration is finished, let the engine idle for at least five minutes to allow the aftertreatment system to cool down. Check if the fault code has cleared.

5. 5

   Perform dealer service cleaning

   If a parked regeneration fails to start or does not clear the fault, the DPF may be too clogged with soot or ash. An authorized dealer or qualified service provider must use specialized diagnostic tools (like John Deere Service Advisor) to perform a forced regeneration or remove the DPF for professional cleaning or replacement.