Cummins Fault Code

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SPN 111 FMI 1

Engine Shutdown

System

Cooling

Symptom

Engine Shutdown

Diagnosis & fix steps

LOGIC: Coolant Level Critically Low. ACTION: Add coolant and inspect for leaks at the EGR cooler or water pump weep hole.

Red Seal field insights

Logic: This is a "Critical" code that kills the engine to prevent warping the head. FIX: If level is full, the sensor probe is fouled.

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