SPN 410 FMI 0EGR
EGR Circuit High
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DVOM Testing — in guided session
Connector Pinout — in guided session
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Overview
Fault Code
SPN 410 / FMI 0
Category
EGR
Derate Risk
No
Regen Inhibit
No
Inducement Risk
No
Component Location: The EGR differential pressure sensor is typically mounted on or near the EGR cooler in the intake system.
Common Symptoms
- Check engine light illuminated with SPN 410 FMI 0
- Excessive black smoke from exhaust
- Poor engine performance and reduced power
- Elevated NOx emissions
- Increased fuel consumption
- Rough idle or surging
- EGR valve stuck open condition
Root Causes
- EGR valve stuck open or mechanically failed in open position
- EGR cooler clogged or restricted causing excessive differential pressure
- EGR differential pressure sensor failed high or out of range
- Carbon buildup on EGR valve seat preventing proper closure
- Wiring short to voltage on EGR pressure sensor signal circuit
- EGR valve actuator solenoid failure
- Excessive exhaust backpressure driving high EGR flow readings
- ECM software or calibration issue misinterpreting sensor data
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Derate Behavior
Power Derate
No
Mileage / Regen Notes
SPN 410 FMI 0 (EGR Circuit High) can inhibit or limit active DPF regeneration because the ECM may restrict engine load commands and reduce exhaust temperatures needed for regen initiation. A stuck-open EGR valve lowers exhaust temps and disrupts the regen process.
System Interactions
SPN 410 FMI 0 interacts with the following systems and may trigger cascading faults if not resolved promptly.
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.
Related Faults in This Category
OEM System Resources
ASE Training Resources
Diagnostic Engine v7.0
Related Diagnostic Articles
Deep-dive diagnostic page: SPN 410 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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