Cummins Fault Code
Free · no signupSPN 5246
Active Final Inducement / Extreme Derate
System
Emissions
Symptom
Active Final Inducement / Extreme Derate
Diagnosis & fix steps
LOGIC: Regulatory Feedthrift Derate Active.
ACTION: Check SCR efficiency, DEF quality, or for active SCR dosing system blockages. Force a deep stationary regeneration.
Red Seal field insights
Global Standard: The nuclear option of modern diesel networks. It indicates an unaddressed emissions fault has timed out, locking the engine into safe operational limit speeds (usually 5 mph max) until cleared by a factory level reset.
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