Deutz Fault Code

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Code 5-1-1 / SPN 102 FMI 2

Black Exhaust / Sluggish Acceleration

System

Air Intake

Symptom

Black Exhaust / Sluggish Acceleration

Diagnosis & fix steps

LOGIC: Charge Air Manifold Boost Pressure Implausible. ACTION: Remove MAP sensor and clean carbon/oil film off sensing tip. Inspect charge air cooler (CAC) silicone boots for splits or loose hose clamps.

Red Seal field insights

Air-Fuel Ratio: Inaccurate boost pressure data prevents the EMR governor from calculating correct air mass, restricting unit pump injection fueling under load.

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