SPN 2262 FMI 0Air
Turbocharger/Supercharger Boost Control A Circuit
Scan Tool — in guided session
DVOM Testing — in guided session
Connector Pinout — in guided session
DieselVision™ Upload photos — DieselVision™ reads diagrams, connectors, and screens with precision.
Overview
Fault Code
SPN 2262 / FMI 0
Category
Air
Derate Risk
Possible
Regen Inhibit
No
Inducement Risk
No
Component Location: VGT actuator and boost pressure sensor are mounted on or near the turbocharger, typically on the driver-side of the engine in the valley or exhaust manifold area.
Common Symptoms
- Boost pressure reading above expected range or exceeding calibrated limit
- Engine derate or power reduction under load
- Turbocharger overboost condition detected during acceleration
- Check engine or MIL lamp illuminated
- Possible black or excessive exhaust smoke under hard acceleration
- Turbo actuator or VGT vane position not responding correctly
Root Causes
- Turbocharger VGT actuator failure or sticking vanes causing overboosting condition
- Boost pressure sensor fault providing erroneous high reading to ECM
- Air intake restriction or charge air cooler restriction causing abnormal boost signal
- ECM/ECU calibration issue or software fault misinterpreting boost control feedback
- Intake manifold leak or cracked charge air cooler piping causing false boost readings
Full step-by-step tests, DVOM guidance, and pinout data are available inside the AI Diesel Tech diagnostic session.
AI walks you through every test — one step at a time. Plans start at $12.95/mo.
Derate Behavior
Power Derate
Possible
Mileage / Regen Notes
SPN 2262 FMI 0 can inhibit or interrupt active DPF regeneration cycles due to abnormal boost conditions triggering engine derate or protection mode, preventing regen completion.
System Interactions
SPN 2262 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 2262 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.
Get weekly diesel diagnostic tips
Real-world fault code walkthroughs, wiring tips, and shop-tested fixes — free.
No spam. Unsubscribe anytime.
Get AI-Guided Diagnosis for SPN 2262 FMI 0
The diagnostic engine walks you through every physical test — step by step, on your phone, at the truck. No guessing. No wasted parts.