Deutz Fault Code
Free · no signupCode 9-1-4 / SPN 108 FMI 2
Poor Altitude Performance / Black Smoke
System
Sensors / Air
Symptom
Poor Altitude Performance / Black Smoke
Diagnosis & fix steps
LOGIC: Ambient Barometric Pressure Sensor Signal Implausible.
ACTION: Inspect baro pressure sensor port integrated inside EMR casing. Clean dust blockages or replace EMR unit if internal sensor membrane is damaged.
Red Seal field insights
Density Mapping: Without valid barometric pressure telemetry, the EMR cannot accurately trim fuel injection maps for varying operating altitudes.
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