Case IH 19795 (DTC F89F) – Engine Control Unit (ECU / EDC) or Vehicle Control Module (VCM): SCR Inducement: Level 3 (creep mode), triggered by DEF/AdBlue Consumption fault

The system has detected that the DEF/AdBlue consumption is irregular or too low (Reagent Consumption fault). Because this root issue was not resolved during the initial warning phases (Level 1 torque reduction), the system has escalated to a 'Level 3 Inducement,' forcing the machine into 'creep mode' (a severe engine speed and torque derate) to prevent operation while emissions are non-compliant.

• MAXXUM T4E
• Case IH Maxxum series tractors
• Case IH Magnum series tractors
• Case IH Steiger series tractors
• Case IH Patriot Sprayers (e.g., 4440)
• Case Construction N-Series Loaders
• Case Construction Crawler Dozers (e.g., 650L)

1. 1

   Check DEF quality and level to ensure the tank is filled with uncontaminated, ISO 22241-compliant 32.5% DEF/AdBlue.

2. 2

   Inspect the DEF injector (dosing valve) nozzle for crystallized urea buildup that restricts proper spraying.

3. 3

   Check for leaks and pressure issues in the heated DEF lines, seals, and tubes.

1. 1

   Identify the Root Fault

   Use an Electronic Service Tool (EST) to pull the accompanying root fault code (e.g., DEF pressure too low, DEF dosing valve blocked).

2. 2

   Address Crystallization/Clogging

   If the DEF injector is clogged with crystallized urea, clean the mounting boss and replace the DEF doser injector.

3. 3

   Address Supply Issues

   If the system cannot build pressure and no leaks are found in the lines, replace the DEF Dosing Module (Supply Pump).

4. 4

   Clear the Inducement

   Once the defective component (injector, pump, or line) is replaced, clear the root fault code using the diagnostic tool. The Level 3 Inducement (19795 / F89F) is a symptom-based code and will automatically clear or become inactive once the ECU verifies that normal DEF dosing and consumption have resumed.