ECU 003516.16 – Aftertreatment DEF Concentration Moderately High. John Deere System Advisory.

ECU 003516.16 (ECU 3516.16)

Code: 003516.16

Shortcode: 3516.16

Description:

This error code indicates that the DEF concentration sensor has detected that the DEF fluid concentration in the tank is moderately higher than the specified range. While not immediately damaging, sustained high concentrations can affect the efficiency of the aftertreatment system.

Reaction:

The ECU may adjust DEF dosing rates or modify the operation of the aftertreatment system to compensate for the high DEF concentration, aiming to maintain emissions compliance.

Recommendations:

  • Verify DEF Concentration: Test the DEF to confirm its concentration and ensure it aligns with manufacturer specifications.
  • Adjust DEF Mixture: If the DEF concentration is too high, consider diluting it with the appropriate amount of distilled water to bring it within the acceptable range.
  • Recalibrate DEF Dosing System: Adjust the DEF dosing system settings to ensure accurate dosing based on the new concentration levels.
  • Reset ECU and Test System: After adjustments, reset the ECU to clear the fault code and conduct tests to ensure the system functions correctly with the adjusted DEF concentration.

Note:

Proper DEF concentration is essential for the efficient operation of the aftertreatment system. Regular monitoring and adjustment of DEF concentration can prevent issues related to over-concentration and ensure compliance with emissions regulations.


Control Units: John Deere

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