This Cummins 2742 troubleshooting document is a fault-code procedure for diagnosing Aftertreatment Exhaust Gas Temperature 2 on Cummins CM2150 engines. It explains why Fault Code 2742 sets when the aftertreatment system cannot reach required temperature for stationary regeneration or water removal during extended idle. The file is useful when checking exhaust heat loss, sensor readings, VGT/EGR related faults, and stationary regeneration results with INSITE™.
Official Cummins 2742 troubleshooting document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB, ISC, and ISL; file group lists ISB6.7 CM2150 (2007-09) |
| System/Group | Aftertreatment System / DTCs |
| Publication no. | Not listed in the extract |
| Year/Revision | Last modified 28-Jul-2010 and 20-Jul-2010; model year unknown |
| Pages | 10 |
| File size | 0.2 MB |
| Format | |
| 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 – Check the exhaust system for leaks.
- Guided Step 3 – Check the turbocharger outlet.
- Guided Step 4 – Perform a stationary regeneration.
- Guided Step 5 – Clear the fault code.
Applicable truck models
This procedure covers Cummins ISB, ISC, and ISL engines using the CM2150 aftertreatment system, with the file listing ISB6.7 CM2150 (2007-09) in the DTC group. The extract references stationary regeneration information for ISB CM2150 Service Manual Bulletin 4021578 and ISC and ISL CM2150 Service Manual Bulletin 4021569, and it notes that aftertreatment diesel oxidation catalyst location can vary by OEM installation. For official brand information, visit Cummins official website.
Who needs this Cummins 2742 troubleshooting manual
Workshop owners, diesel mechanics, and fleet technicians need this manual when Fault Code 2742, SPN 3249 FMI 17, appears during aftertreatment diagnostics. It supports checks for aftertreatment temperature sensors, exhaust leaks between the turbocharger outlet and aftertreatment system, incorrect or uninsulated OEM downpipes, and oil, coolant, fuel, or moisture at the turbocharger exhaust outlet.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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