Deutz Fault Code
Free · no signupCode 1-1-1 / SPN 94 FMI 1
Engine Sags under Heavy Load / Stalls
System
Fuel System
Symptom
Engine Sags under Heavy Load / Stalls
Diagnosis & fix steps
LOGIC: Low Pressure Fuel Supply Pressure Below Limit.
ACTION: Replace primary fuel filter and water separator element. Check electric/mechanical lift pump supply delivery pressure (>2.5 bar spec) and inspect tank pickup tube screen.
Red Seal field insights
Supply Starvation: Restricted low-pressure fuel supply starves the individual Unit Pumps (PLD/PDE), preventing high-pressure injection lines from hitting target pressures.
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