This Cummins DPF sensor troubleshooting document explains Fault Code 1879 for the aftertreatment diesel particulate filter differential pressure sensor circuit. It covers the circuit description, fault conditions, sensor and harness checks, ECM connector inspection, INSITE fault-code verification, and repair validation steps for the listed CM2250 engines.
Official Cummins DPF sensor troubleshooting document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, QSB6.7 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; aftertreatment diesel particulate filter differential pressure sensor |
| Publication no. | 4022254 for ISB6.7 CM2250; associated bulletin numbers also include 4022257, 4022250, 2883445, 4022256, and 4022255 |
| Year/Revision | Last Modified: 11-Jun-2010; troubleshooting revision shown as 21-Jan-2011 |
| Pages | 15 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- FAULT CODE 1879 – Aftertreatment Diesel Particulate Filter Differential Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source
- 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 – Check the aftertreatment diesel particulate filter differential pressure sensor and circuit
- Guided Step 3 – Check the ECM and OEM harness
- Guided Step 4 – Check ECM calibration and clear the fault code
Applicable truck models
The procedure applies to Cummins CM2250 engine platforms listed in the document, including ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, and QSB6.7 CM2250. Component location is OEM-dependent because the aftertreatment diesel particulate filter differential pressure sensor is mounted on the diesel particulate filter, so the OEM service manual is referenced for exact location and connector identification. See the manufacturer information at Cummins official website.
Who needs this Cummins DPF sensor troubleshooting manual
This manual is useful for diesel mechanics, fleet technicians, and workshop owners diagnosing an amber CHECK ENGINE lamp, disabled diesel particulate filter regeneration, disabled diesel exhaust fluid injection, EGR closure, or torque reduction linked to Fault Code 1879. It supports checks for open return circuits, signal circuits shorted to sensor supply or battery voltage, dirty or damaged pins, OEM harness resistance, pin-to-pin short circuits, and ECM calibration revision status.
This file provides Cummins DPF sensor troubleshooting in a compact service-library format for fast workshop reference. The full PDF is available in the DiagTechPro manuals library, free account required to download.
Related manuals library
Sản phẩm liên quan cho hãng này
Cùng brand theo taxonomy hiện có trong catalog WooCommerce.
Cummins Calterm Version 5.16 – Advanced ECM Control and Precision Tuning for Cummins Engines
Cummins INSITE 9.3 – The Essential Diagnostic Tool for Cummins Engines
Cummins InCal CE – The Calibration and Configuration Tool for Cummins Engines
