This Cummins code 2961 document is a 10-page troubleshooting procedure for Fault Code 2961 on CM2250 engines. It explains the EGR temperature sensor circuit, fault logic, possible causes, INSITE™ checks, cooling system checks, EGR differential pressure port inspection, ECM calibration review, and fault clearing steps.
Official Cummins code 2961 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; also lists ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, and QSB6.7 CM2250 in associated procedures. |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Exhaust Gas Recirculation Temperature Sensor Circuit |
| Publication no. | Not stated. Associated procedure bulletin numbers include 4022254, 4022257, 4022250, 2883445, 4022256, and 4022255. |
| Year/Revision | Year unknown; last modified 11-Jun-2010 and 30-Dec-2010 |
| 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 cooling system.
- Guided Step 3 – Check the EGR system.
- Guided Step 4 – Check ECM calibration and clear fault codes.
Applicable truck models
The file identifies coverage for ISB6.7 CM2250 and references the same diagnostic and associated procedure structure for ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, and QSB6.7 CM2250 engine models. It applies to the EGR temperature sensor circuit, where the ECM detects EGR temperature above 274°C [525°F] for more than 5 seconds, logs Fault Code 2961, and can derate engine torque up to 40 percent to limit EGR temperature. See the manufacturer at Cummins official website.
Who needs this Cummins code 2961 manual
This manual is useful for diesel mechanics, fleet technicians, and workshop owners diagnosing EGR temperature faults that may not be active with no load in the shop. It supports checks for coolant mixture, coolant level, EGR differential pressure sensor ports, EGR differential pressure tubes, EGR cooler condition, ECM calibration, and INSITE™ fault clearing.
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