ECU 005246.13 – SCR Operator Derate Notification Active. John Deere System Advisory.

ECU 005246.13 (ECU 5246.13)

Code: 005246.13

Shortcode: 5246.13


This informational fault code notifies the operator that the SCR system derate timer is active. It indicates that the system is counting down to a derate condition if the underlying issues are not resolved in a timely manner.


The ECU issues an informational notification to the operator, indicating that the derate timer is active and that actions must be taken to prevent the system from reaching a derate state.


  • Review Operator Manual: Check the operator manual for detailed instructions and timelines regarding the SCR derate stages.
  • Inspect SCR System: Verify that the SCR system is functioning correctly. Look for any issues that may be causing the derate timer to activate, such as low DEF levels or system faults.
  • Address SCR Faults: If there are any active SCR-related fault codes, follow the diagnostic procedures to resolve them.
  • Refill DEF Tank: Ensure that the Diesel Exhaust Fluid (DEF) tank is adequately filled with high-quality DEF.
  • Monitor SCR Performance: Keep an eye on the SCR system’s performance and address any warnings or alerts promptly.
  • Reset ECU and Monitor System: After addressing the issue, reset the ECU to clear the notification and monitor the system to ensure proper operation.


Promptly addressing SCR system issues and maintaining the proper DEF levels are crucial to preventing derate conditions and ensuring optimal engine performance. Regular maintenance and timely interventions can help avoid performance limitations.

Control Units: John Deere

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