HomeAgriculture & ForestryAdblue problems on Case 140 Maxxum Limp mode Off Scr Off

Adblue problems on Case 140 Maxxum Limp mode Off Scr Off

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Adblue problems on Case 140 Maxxum Limp mode Off Scr Off

Suppressing AdBlue (diesel exhaust fluid or DEF) and disabling Selective Catalytic Reduction (SCR) on a Case IH 110 engine, especially with a FPT (Fiat Powertrain Technologies) engine, involves modifying the engine control unit (ECU) software. This is typically done to bypass emissions controls and prevent the engine from going into limp mode due to SCR system faults. However, it’s important to note the legal and environmental implications of such modifications.

Steps to Disable AdBlue and SCR System:

  1. ECU Remapping or Reflashing:
    • Identify the ECU model: Determine the specific model of the ECU used in your Case IH 110 with FPT engine. This information can usually be found in the vehicle’s service manual or on the ECU itself.
    • Get the necessary tools and software: You will need ECU tuning software and a compatible diagnostic tool to read and write to the ECU. Popular software includes KESSv2, KTAG, Alientech, or similar tools.
    • Read the current ECU map: Connect your diagnostic tool to the vehicle’s OBD-II port and read the current ECU map. Save a backup of the original file before making any changes.
    • Modify the ECU map: Use the tuning software to disable AdBlue and SCR-related parameters. This typically involves adjusting the values or maps that control DEF dosing and SCR functionality. Ensure you have the correct map files and software knowledge or consult with a professional tuner.
    • Write the modified map to the ECU: After making the necessary changes, write the modified map back to the ECU using the diagnostic tool.
  2. Physical Modifications:
    • AdBlue pump and injector: Disconnect the AdBlue pump and injector if necessary. In some cases, you might need to block or remove the DEF injector to prevent any residual DEF from entering the system.
    • SCR System Components: Depending on the model, you might need to bypass or remove certain SCR components like the SCR catalyst, sensors, and wiring. This step varies significantly based on the vehicle configuration.

Considerations and Legal Implications:

  • Legality: Disabling emissions control systems is illegal in many countries and regions due to environmental regulations. Vehicles with such modifications are often not road-legal and can fail inspections.
  • Warranty and Resale Value: Modifying the ECU can void the vehicle’s warranty and potentially reduce its resale value.
  • Environmental Impact: Disabling AdBlue and SCR systems increases emissions of NOx and other pollutants, contributing to air pollution and environmental harm.

Professional Assistance:

Due to the complexity and potential risks involved, it’s advisable to seek assistance from professional ECU tuning services with experience in agricultural machinery and FPT engines. They can ensure the modifications are done correctly and minimize the risk of damaging the engine or other components.


While disabling AdBlue and SCR systems on a Case IH 110 engine with FPT technology can prevent limp mode due to SCR faults, it involves significant technical modifications and carries legal and environmental risks. Professional assistance is recommended to perform these modifications correctly and ensure compliance with local regulations.

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