This code 2961 DTCs document is a diagnostic procedure for an EGR temperature fault on ISB, ISC, and ISL engines. It explains the circuit, fault conditions, ECM response, likely causes, and guided troubleshooting steps for Code 2961. The file is useful when the engine derates because exhaust gas recirculation temperature is above the protection limit.
Official code 2961 DTCs document details
| Brand | Cummins |
| Model coverage | ISB6.7 CM2150 (2007-09); extract also references ISB, ISC, and ISL engines |
| System/Group | DTCs; Exhaust Gas Recirculation Temperature Sensor Circuit |
| Year/Revision | Last Modified: 23-Sep-2010; troubleshooting steps Last Modified: 20-Jul-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 – Clear the fault code.
Applicable truck models
This PDF applies to Cummins ISB6.7 CM2150 coverage listed for 2007-09, with the diagnostic text also naming ISB, ISC, and ISL applications for the Exhaust Gas Recirculation Temperature Sensor Circuit. The procedure describes an EGR temperature sensor located on the EGR connection tube between the EGR valve and the air intake connection. The fault is set when the ECM detects EGR temperature above 210°C [410°F] for ISB or 237°C [460°F] for ISC and ISL for more than 5 seconds. For official engine and service information, see Cummins official website.
Who needs this code 2961 DTCs manual
Workshop owners, diesel technicians, and fleet mechanics need this manual when diagnosing EGR temperature derate complaints, inactive Fault Codes 1899 or 2359, coolant-level issues, coolant mixture problems, EGR differential pressure sensor leaks, plugged EGR differential pressure flow ports, or a fouled EGR cooler. It also identifies when INSITE™ electronic service tool checks are required to read active fault codes, verify the fault is inactive, and clear inactive fault codes after repairs.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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