SPN 107 FMI 0Turbo/AirMedium
Air Filter Differential Pressure — Data Valid But Above Normal
Scan Tool — in guided session
DVOM Testing — in guided session
Connector Pinout — in guided session
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Overview
Fault Code
SPN 107 / FMI 0
Category
Turbo/Air
Fault Type
sensor
FMI Category
above normal
Severity
Medium
Derate Risk
No
Regen Inhibit
No
Inducement Risk
No
Component Location: Air filter restriction sensor on air filter housing — typically driver side of cab, behind bumper or in engine compartment.
Common Symptoms
- Air filter restriction warning lamp on
- Possible slight power reduction at high load
- Air filter restriction indicator showing red
- Increased fuel consumption
Root Causes
- Air filter element plugged — normal wear requiring replacement
- Air filter housing seal damaged — bypassing dirty air
- Air filter restriction sensor failure reading high
- Pre-cleaner (air intake pre-filter) plugged
- Air intake duct collapsed or kinked
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Derate Behavior
Power Derate
No
Mileage / Regen Notes
Maintenance-driven. Higher frequency in construction, mining, and agricultural environments.
System Interactions
SPN 107 FMI 0 interacts with the following systems and may trigger cascading faults if not resolved promptly.
TSB Reference: OEM PM schedule — air filter replacement interval typically every 25,000–50,000 miles depending on operating environment.
Common Diagnostic Mistakes
Replacing the sensor without verifying wiring continuity and supply voltage first.
Clearing codes without identifying and resolving the root cause — the fault will return.
Ignoring related active faults — cascading faults often share a root cause.
Skipping the connector inspection — corrosion and damaged pins are a leading cause of sensor faults.
Condemning the ECM before exhausting all wiring and component tests.
OEM Notes
Cummins
X15: Replace filter when restriction exceeds 25 in H2O. Do not clean and reuse OEM paper elements.
Detroit
DD15: Check pre-cleaner bowl for debris accumulation — empty at every PM.
PACCAR
MX-13: Inspect air intake pre-cleaner at every oil change in dusty environments.
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OEM System Resources
ASE Training Resources
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Related Diagnostic Articles
Deep-dive diagnostic page: SPN 107 FMI 0 — Full FSM Sequence & Repair Steps — includes wiring notes, sensor specs, and gated repair procedures.
Authority References
Diagnostic procedures on this page are informed by OEM service literature and industry standards.
Cummins QuickServe OnlineOfficial Cummins service manuals, fault code lookup, and TSB database.Detroit Diesel DiagnoCentralDetroit Diesel diagnostic procedures, DDDL documentation, and service literature.PACCAR MX Engine ServicePACCAR MX-11 and MX-13 engine service documentation and DAVIE diagnostic guides.Volvo/Mack Tech ToolVolvo and Mack engine fault code reference and PTT/Tech Tool diagnostic procedures.ASE — Diesel Truck Technician CertificationNational Institute for Automotive Service Excellence — T2 Diesel Engines certification standards.EPA Aftertreatment & Emissions GuidelinesU.S. EPA heavy-duty diesel aftertreatment compliance, DPF/SCR regulations, and NOx standards.
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