Deutz Fault Code

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Code 1-1-3 / SPN 157 FMI 18

Limp Mode / Reduced Engine Output

System

Fuel System

Symptom

Limp Mode / Reduced Engine Output

Diagnosis & fix steps

LOGIC: Fuel Rail / Unit Pump Rail Pressure Below Target. ACTION: Check high-pressure unit pump solenoids. Test mechanical fuel pressure relief valve (PRV) for seat leakage into return line.

Red Seal field insights

Pressure Drift: The EMR controller detects actual injection gallery pressure lagging behind requested governor maps under acceleration.

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