This Cummins 2778 fault code document is a diagnostic PDF for the ISB6.7 CM2150 aftertreatment system. It explains why Fault Code 2778 is set, how possible fuel dilution of lubricating oil is handled, and how the code is cleared with INSITE™ electronic service tool.
Official Cummins 2778 fault code document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09) |
| System/Group | DTCs; Aftertreatment System |
| Publication no. | Not shown in extract |
| Year/Revision | Last Modified: 20-Jul-2010 |
| Pages | 5 |
| 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 1A – Check for active fault codes.
- Guided Step 2 – Clear the fault code.
- Guided Step 2A – Disable the fault code.
- Guided Step 2B – Clear the inactive fault codes.
Applicable truck models
This file applies to Cummins ISB6.7 CM2150 engines from the 2007-09 coverage group. The document also references ISB engines for lubricating oil service procedure 007-037 in the ISB CM2150 Service Manual, Bulletin 4021578, and references ISC and ISL engines for procedure 007-037 in the ISC and ISL CM2150 Service Manual, Bulletin 4021569. The aftertreatment diesel particulate filter is installed in the exhaust system by the original equipment manufacturer, and the inhibit switch may be a dash switch or a J1939 message sent through the J1939 datalink. For brand information, visit the Cummins official website.
Who needs this Cummins 2778 fault code manual
This manual is for technicians diagnosing an amber lamp with SPN 3481, FMI 0/16, PID 289, and possible diesel fuel dilution of engine oil during aftertreatment regeneration. It is also useful for workshop owners who need the documented Cummins sequence for checking active codes, changing engine lubricating oil, resetting the Maintenance Monitor feature, and clearing inactive fault codes.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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