AI Diesel Tech

Fault Code Reference

SPN 1350 FMI 6ABS

ABS Modulator Valve - Front Right - Current Above Normal/Short Circuit

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Overview

Fault Code

SPN 1350 / FMI 6

Category

ABS

Derate Risk

No

Regen Inhibit

No

Inducement Risk

No

Component Location: The front right ABS modulator valve is integrated into the ABS control module mounted on the vehicle frame rail near the front axle.

Common Symptoms

  • ABS warning lamp illuminated on dash
  • Right front wheel lockup during hard braking
  • Loss of ABS function on right front wheel
  • Traction control malfunction indicator
  • Audible clicking or chattering from right front ABS modulator

Root Causes

  • Short circuit in front right modulator valve wiring harness Failed front right ABS modulator valve solenoid Damaged or corroded ABS modulator connector Water intrusion in ABS modulator electrical connector Failed ABS control module driving excessive current

Full step-by-step tests, DVOM guidance, and pinout data are available inside the AI Diesel Tech diagnostic session.

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Derate Behavior

Power Derate

No

System Interactions

SPN 1350 FMI 6 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.

Deep-dive diagnostic page: SPN 1350 FMI 6 — Full FSM Sequence & Repair Steps — includes wiring notes, sensor specs, and gated repair procedures.

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