Case IH 19780 – Engine Control Unit (ECU) / Engine Control Module (ECM) or Vehicle Control Module (VCM): Customer Hard Inducement: Level 1 (Torque reduction), triggered by SCR system related fault

This is a consequential (or secondary) fault code. It means the Selective Catalytic Reduction (SCR) system has detected a critical primary fault—such as poor Diesel Exhaust Fluid (DEF) / AdBlue® quality, a DEF dosing interruption, tampering, or a hardware failure. Because the primary fault was not resolved within the allowed warning period (or after a set number of engine restarts), the system enforces a 'Hard Inducement'. This inducement immediately reduces engine torque by 50% and limits the engine to idle to force the operator to service the machine and comply with emissions regulations.

• Tier 4b
• Magnum Tractors 180
• Magnum Tractors 190
• Magnum Tractors 210
• Magnum Tractors 225
• Magnum Tractors 235
• Magnum Tractors 250-380
• Steiger / Quadtrac 350
• Steiger / Quadtrac 400
• Steiger / Quadtrac 450
• Steiger / Quadtrac 500
• Steiger / Quadtrac 550
• Steiger / Quadtrac 600
• Farmall Tractors 110A
• Farmall Tractors 120A
• Farmall Tractors 130A
• Farmall Tractors 140A
• Axial-Flow Combines 5130
• Axial-Flow Combines 6130
• Axial-Flow Combines 7130
• Axial-Flow Combines 7230
• Axial-Flow Combines 8230
• Axial-Flow Combines 9230
• Case N-series TLBs
• F-Series Wheel Loaders 1021F
• F-Series Wheel Loaders 1121F
• F-Series Wheel Loaders 521F

1. 1

   Scan for Primary Fault Codes: Use the Case IH Electronic Service Tool (EST) to read all active codes. Look for the primary SCR fault (e.g., NOx sensor plausibility, DEF pump temperature, DEF quality/level) that triggered the 19780 inducement.

2. 2

   Test DEF/AdBlue Quality: Use a refractometer to verify the DEF is at the required 32.5% aqueous urea concentration and is free of contamination.

3. 3

   Inspect the DEF Dosing System: Check the DEF tank, dosing pump, injector, and lines for leaks, blockages, or urea crystallization.

4. 4

   Check Wiring and Sensors: Inspect the wiring harnesses for the upstream/downstream NOx sensors and the DEF dosing module for damage, corrosion, or short circuits.

1. 1

   Resolve the Root Cause

   Repair or replace the failed component identified by the primary SCR fault code (e.g., replace a failed NOx sensor, swap a clogged DEF filter, or replace a faulty DEF dosing module).

2. 2

   Flush DEF System (If Applicable)

   If the primary fault was caused by poor DEF quality, drain the DEF tank, flush the system, and refill with fresh, high-quality DEF.

3. 3

   Clear Primary Codes

   Connect the Case IH EST diagnostic tool and clear the primary SCR fault codes.

4. 4

   Reset the Inducement / Restart Counter

   You cannot clear code 19780 with a standard code-clear command. You must use the Case IH EST to perform an 'SCR System Validation Test' or explicitly 'reset the engine restart counter'.

5. 5

   Validation Run

   Run the machine to ensure the validation completes successfully. The ECU will lift the 50% torque reduction and restore full engine power once the system verifies the SCR fault is resolved.