John Deere 189.31 – ECU: The Engine Is In An Active Derate Mode, Check For Other Error Codes

This is an informational/symptom code indicating that the control module has detected a critical condition (usually related to emissions, fuel pressure, or extreme temperatures) and has intentionally limited the engine's speed or power to protect the engine from damage or to comply with emissions regulations.

• 5085E
• 5090E
• 5090EL
• 5100E
• 5085M
• 5100M
• 5100MH
• 5100ML
• 5115ML
• 5090M
• 5115M
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 5095M
• 9560RT
• 644K Wheel Loader
• 160G Excavator
• 1010G Forwarder
• JD 4045
• 6.8L PowerTech
• 8.1L PowerTech
• 9.0L PowerTech
• 12.5L PowerTech

1. 1

   Connect a diagnostic tool (such as John Deere Service Advisor) and pull all active and stored codes to find the primary companion code

2. 2

   Check for DPF restriction codes (e.g., 3251.07 DPF Differential Pressure Signal Mismatch or 3719.15 DPF Regeneration Fault)

3. 3

   Check for EGR issue codes (e.g., 2659.14 Calculated EGR flow rate error or 2791.06 EGR Valve Drive Circuit Low Resistance)

4. 4

   Check for fuel system issue codes indicating low fuel pressure or water in fuel

5. 5

   Monitor the DPF soot load and differential pressure parameters via the diagnostic tool to see if the exhaust filter is severely restricted

1. 1

   Identify the Root Cause

   Ignore 000189.31 temporarily and focus your repair efforts on the primary active code (e.g., replacing a failed DPF differential pressure sensor or cleaning a clogged EGR valve).

2. 2

   Perform the Physical Repair

   Replace the faulty sensor, drain the water separator, or clean/replace the restricted Diesel Particulate Filter as dictated by the primary code.

3. 3

   Clear Latched Codes

   Use John Deere Service Advisor (or an equivalent advanced diagnostic tool) to clear latched codes. Clearing codes via the in-cab monitor will often not work for derate conditions.

4. 4

   Perform a Service Regeneration

   If the root cause was DPF/soot related, use the diagnostic tool to force a Service Regeneration or DPF Service Recovery to burn off excess soot and reset the soot load parameters in the ECU.

5. 5

   Verify Repair

   Once the primary issue is repaired, the regeneration is complete, and the codes are cleared, the ECU will automatically lift the derate mode, and code 000189.31 will disappear.