ECU 003516.07 – Aftertreatment DEF Concentration Sensor Obstructed. John Deere System Advisory.

ECU 003516.07 (ECU 3516.07)

Code: 003516.07

Shortcode: 3516.07

Description:

This fault code is triggered when the Diesel Exhaust Fluid (DEF) concentration sensor in the aftertreatment system detects an obstruction, such as debris, that interferes with its ability to accurately measure the DEF concentration. This can lead to incorrect DEF dosing, potentially affecting the emission control performance.

Reaction:

The ECU may issue warnings, modify DEF dosing, or initiate additional diagnostics to verify sensor readings, potentially affecting overall vehicle performance to prevent emission standard violations.

Recommendations:

  • Inspect and Clean Sensor: Check the DEF concentration sensor for any visible obstructions or debris and clean it thoroughly.
  • Check DEF Quality and Tank Condition: Ensure that the DEF is free of contaminants and that the tank is clean to prevent future sensor blockages.
  • Test Sensor Functionality: After cleaning, test the sensor to ensure it provides accurate readings.
  • Reset ECU and Monitor for Recurrence: Reset the ECU to clear the fault and monitor the system to ensure no further issues occur with the sensor.

Note:

Maintaining a clean and unobstructed DEF system is essential for accurate monitoring and control of the DEF dosing required for effective emissions reduction.


Control Units: John Deere

John Deere Parts
John Deere Logo