SPN 2290 FMI 0DPFInducement Risk
DPF Differential Pressure Sensor Circuit
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DVOM Testing — in guided session
Connector Pinout — in guided session
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Overview
Fault Code
SPN 2290 / FMI 0
Category
DPF
Derate Risk
Possible
Regen Inhibit
No
Inducement Risk
Yes — SCR inducement possible
Component Location: The DPF differential pressure sensor is typically mounted on the DPF housing or nearby frame rail with hoses connected to inlet and outlet of the DPF.
Common Symptoms
- Check engine light illuminated
- Engine derate or loss of power
- DPF regeneration does not initiate
- Excessive black smoke during operation
- Poor fuel economy
Root Causes
- Faulty DPF differential pressure sensor Clogged or damaged pressure sensing hoses Corroded or damaged sensor connector Soot accumulation blocking pressure ports Failed sensor circuit wiring
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Derate Behavior
Power Derate
Possible
SCR Inducement Risk
If left unresolved, this fault may trigger SCR inducement — a progressive derate enforced by the ECM to ensure emissions compliance.
System Interactions
SPN 2290 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.
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OEM System Resources
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Related Diagnostic Articles
Deep-dive diagnostic page: SPN 2290 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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