Case IH F-5246-16 - ECU – Engine Control Unit (ECU): Info: SCR Inducement: Level 1 (Torque reduction), triggered by Tampering fault

This is an informational and regulatory derate code indicating that the engine control system has detected a critical issue with the Selective Catalytic Reduction (SCR) / Diesel Exhaust Fluid (DEF) emissions system that it classifies as a 'tampering' fault, activating a Level 1 Inducement which enforces an engine torque reduction.

• MAGNUM AFS Connect
• Axial-Flow 240 Series (7240, 8240, 9240)
• Steiger
• Magnum
• Optum
• Puma
• Farmall series (Farmall 40-50 CVT)

1. 1

   Scan for Root Cause Codes: Connect the CNH Electronic Service Tool (EST) and pull all active fault codes to find the accompanying root cause code (e.g., NOx sensor, DEF dosing, or DEF quality faults).

2. 2

   Visual Inspection: Check the SCR system wiring harnesses, DEF dosing valve, and NOx sensors for physical damage, corrosion, or actual tampering (disconnected plugs).

3. 3

   Fluid Check: Verify that the DEF tank is full and that the fluid is not contaminated with diesel or water, which frequently triggers tampering/quality codes.

1. 1

   Diagnose the Root Cause

   Identify the accompanying fault code found during the diagnostic scan.

2. 2

   Perform the Primary Repair

   Fix the underlying issue (e.g., replace a failed NOx sensor, clean a clogged DEF dosing valve, or drain and refill contaminated DEF).

3. 3

   Clear Codes

   Clear the root cause fault code using the diagnostic tool. Note that F-5246-16 cannot be cleared manually; it is locked by the ECU.

4. 4

   Inducement Validation Restart

   Perform an 'Inducement Validation Restart' or a forced SCR regeneration via the CNH EST. The engine must run under specific parameters so the ECU can test the SCR system.

5. 5

   Healing

   Once the ECU verifies the emissions system is functioning correctly, the 'repeated offender logic' is satisfied, the F-5246-16 code will automatically heal, and full engine torque will be restored.