fault code 3375 DTCs Troubleshooting Manual — Aftertreatment

This fault code 3375 DTCs document is a troubleshooting manual for aftertreatment diesel particulate filter regeneration too frequent conditions. It explains the circuit logic, conditions for setting and clearing the fault, related INSITE™ checks, and guided repair steps for aftertreatment components.

Official fault code 3375 DTCs document details

Brand Cummins
Model coverage ISX11.9 CM2250, ISX15 CM2250, GX CM2250, QSL9 CM2250, QSB6.7 CM2250
System/Group Aftertreatment Diesel Particulate Filter Regeneration / DTCs
Publication no. Not stated in the extract; associated bulletin numbers include 4022250, 2883445, 4022256, and 4022255
Year/Revision Last Modified: 11-Jun-2010 and 08-Dec-2010
Pages 13
File size 0.2 MB
Format PDF
Language English

Document table of contents

  • Overview
  • Circuit Description
  • Component Location
  • Conditions for Running the Diagnostics
  • Conditions for Setting the Fault Codes
  • Action Taken When the Fault Code is Active
  • Conditions for Clearing the Fault Code
  • Shop Talk
  • Associated Procedures
  • Troubleshooting Steps
  • Guided Step 1 – Check the fault codes.
  • Guided Step 2 – Inspect the aftertreatment diesel particulate filter differential pressure sensor.
  • Guided Step 3 – Check the aftertreatment fuel injector.
  • Guided Step 4 – Inspect the exhaust.
  • Guided Step 5 – Check ECM calibration and clear fault codes.

Applicable truck models

The extract identifies this fault procedure across Cummins CM2250 engine families including ISX11.9 CM2250, ISX15 CM2250, GX CM2250, QSL9 CM2250, and QSB6.7 CM2250. The document states that the aftertreatment diesel particulate filter mounting location is dependent on the OEM, so component location must be checked in the applicable OEM service manual. This file is relevant where Fault Code 3375, PID S115, SPN 5397, FMI 31 is active and the ECM has detected that active regeneration is being requested too soon after a successful regeneration. See the manufacturer’s official resources at Cummins official website.

Who needs this fault code 3375 DTCs manual

Workshop owners, diesel technicians, and fleet mechanics need this code 3375 DTCs manual when diagnosing frequent DPF regeneration complaints with an amber CHECK ENGINE lamp or MIL. It supports structured checks with INSITE™ electronic service tool, including active fault review, differential pressure sensor reading, pressure sensor tube inspection, aftertreatment fuel injector flow testing, diesel oxidation catalyst face plugging inspection, exhaust smoke checking, ECM calibration review, and fault clearing.

The full PDF is available in the DiagTechPro manuals library, free account required to download.

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