SPN 1441 FMI 7ABS
Stability Control System - Mechanical System Not Responding
Scan Tool — in guided session
DVOM Testing — in guided session
Connector Pinout — in guided session
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Overview
Fault Code
SPN 1441 / FMI 7
Category
ABS
Derate Risk
No
Regen Inhibit
No
Inducement Risk
No
Component Location: The stability control modulator is typically mounted on the frame rail near the ABS controller or integrated into the ABS valve assembly.
Common Symptoms
- ABS warning lamp illuminated
- Stability control warning lamp illuminated
- Loss of stability control function
- ABS system disabled
- Vehicle stability system inactive message
- Traction control disabled
Root Causes
- Faulty ABS modulator valve stuck or not responding Damaged or corroded wiring harness to stability control components Failed wheel speed sensor providing incorrect data to stability control module Hydraulic pressure issues in ABS modulator assembly Software calibration mismatch in stability control ECU
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Derate Behavior
Power Derate
No
System Interactions
SPN 1441 FMI 7 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
ASE Training Resources
Diagnostic Engine v7.0
Related Diagnostic Articles
Deep-dive diagnostic page: SPN 1441 FMI 7 — 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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