This document is a code 2639 DTCs diagnostic manual for aftertreatment diesel particulate filter differential pressure on CM2150 engines. It explains why the ECM sets the least severe soot-load fault, what lamps and derates can occur, and how to use INSITE to run stationary regeneration and clear inactive codes.
Official code 2639 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09); extract also references ISB, ISC, and ISL CM2150 service information |
| System/Group | ISB6.7 CM2150 (2007-09) / DTCs; ISB, ISC, and ISL – Aftertreatment System |
| Publication no. | Not shown in the extract |
| Year/Revision | Last Modified: 20-Jul-2010 |
| Pages | 7 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- FAULT CODE 2639
- 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 – Perform the stationary regeneration procedure.
- Guided Step 3 – Clear the fault code.
Applicable truck models
This file applies to Cummins ISB6.7 CM2150 engines in the 2007-09 DTC group, with additional service references for ISB, ISC, and ISL CM2150 aftertreatment systems. The aftertreatment diesel particulate filter is OEM-installed in the exhaust system, so component location is referred to the OEM troubleshooting and repair manual. For manufacturer information, visit Cummins official website.
Who needs this code 2639 DTCs manual
Workshop technicians and fleet maintenance staff need this code 2639 DTCs manual when the DPF lamp is solid or flashing and the soot load has exceeded the recommended limit. It is useful for deciding whether to check other active faults, perform a stationary regeneration, verify ECM calibration through QuickServe Online, or clear inactive codes with INSITE.
The procedure describes Fault Code 2639, PID S324, SPN 3251, and FMI 0/15 as aftertreatment diesel particulate filter differential pressure data valid but above normal operational range. It states that the diagnostic runs continuously above 500 rpm and that light-load operation can prevent exhaust temperatures from becoming high enough for active regeneration. The soot loading table covers four stages: 2639 with a solid DPF lamp, 2639 with a flashing DPF lamp and mild torque derate, 1921 with an amber lamp and moderate derate, and 1922 with a red lamp requiring DPF replacement. The guided steps use INSITE electronic service tool to check active fault codes, run the aftertreatment diesel particulate filter regeneration test, verify the fault becomes inactive, and clear inactive fault codes. If stationary regeneration will not activate, the document directs the technician to the appropriate “Stationary Regeneration – Will Not Activate” troubleshooting tree.
Full PDF 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
