Deutz Fault Code
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Severe Power Derate / Engine Stalls
System
Fuel System
Symptom
Severe Power Derate / Engine Stalls
Diagnosis & fix steps
LOGIC: Fuel Pressure Control Valve (PCV) Permanent Deviation Below Limit.
ACTION: Inspect primary fuel filter/water separator for restriction. Test low-pressure electric supply pump output (>3.5 bar) and check PCV solenoid coil for internal shorting.
Red Seal field insights
Common Rail Physics: High-pressure rail pressure fails to track target ECU maps under load, forcing the ECU into an immediate protective derate loop.
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