ECU 003516.14 – Aftertreatment DEF Contaminated. John Deere System Advisory.

ECU 003516.14 (ECU 3516.14)

Code: 003516.14

Shortcode: 3516.14

Description:

This diagnostic trouble code is triggered when the Diesel Exhaust Fluid (DEF) concentration sensor detects the presence of incorrect fluid in the DEF tank. Contamination can significantly disrupt the chemical reactions necessary for effective emissions reduction and potentially damage the aftertreatment system.

Reaction:

The ECU may initiate a warning and limit engine performance to mitigate the risk of damage due to the contaminated DEF. This can lead to increased emissions and potential non-compliance with environmental regulations.

Recommendations:

  • Inspect and Test DEF Fluid: Verify the DEF fluid for purity and contamination. Use appropriate testing methods to confirm the fluid meets required specifications.
  • Drain and Refill DEF Tank: If contamination is confirmed, completely drain the DEF tank and refill it with high-quality, certified DEF.
  • Flush Aftertreatment System: Clean the aftertreatment system to remove any residual contaminated fluid to prevent further damage.
  • Check and Clean DEF Sensor: Inspect the DEF concentration sensor for any contamination or damage, and clean or replace it if necessary.
  • Reset ECU and Perform Emission Test: After addressing the contamination, reset the ECU to clear the fault code. Conduct an emission test to ensure the aftertreatment system operates correctly and meets all regulatory standards.

Note:

Maintaining the integrity of the DEF supply is crucial for the effective operation of the emission control system. Regular inspections and proper handling of DEF can prevent contamination and ensure compliance with emissions regulations.


Control Units: John Deere