This Cummins 2728 troubleshooting document is a diagnostic procedure for Fault Code 2728 on Cummins aftertreatment systems. It explains the circuit description, code conditions, likely causes, guided checks, stationary regeneration, and clearing steps for the fault. The file is a 7-page English PDF listed for the ISB6.7 CM2150 2007-09 DTC group.
Official Cummins 2728 troubleshooting document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09); extract also references ISB, ISC, and ISL CM2150 engines |
| System/Group | DTCs; 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
- 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 – Perform a stationary regeneration.
- Guided Step 4 – Clear the fault code.
Applicable truck models
This document applies to Cummins engines and aftertreatment systems identified in the extract as ISB6.7 CM2150 (2007-09), with service references for ISB CM2150, ISC CM2150, and ISL CM2150 engines. The procedure concerns Fault Code 2728, SPN 3556, FMI 16, described as Aftertreatment Fuel Injector 1 – Data Valid but Above Normal Operational Range – Moderately Severe Level. The covered system uses aftertreatment temperature sensors around the diesel oxidation catalyst and diesel particulate filter to monitor active regeneration effectiveness. For official brand information, visit Cummins.
Who needs this Cummins 2728 troubleshooting manual
Mechanics, fleet technicians, and workshop owners need this manual when active regeneration is ineffective, the ECM logs Fault Code 2728, or the exhaust and aftertreatment system must be checked with INSITE™ electronic service tool. It is useful for diagnosing VGT and EGR related fault codes, exhaust leaks between the turbocharger and aftertreatment system, and stationary regeneration results.
The procedure notes possible causes including soot plugging the front face of the aftertreatment diesel oxidation catalyst, oil or fuel contamination, a cracked or contaminated catalyst, exhaust leakage between the turbocharger and diesel oxidation catalyst, or a duty cycle that does not provide enough exhaust temperature for complete regeneration. The guided steps instruct the technician to check active codes, inspect exhaust connections and broken components, run the Aftertreatment Diesel Particulate Filter Test, verify the fault is inactive, and clear inactive fault codes.
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