The Cummins fault code 2961 troubleshooting document is a 3-page factory diagnostic reference for the Cummins ISM and ISX CM871 (2007-09) engine platform, covering EGR temperature least severe (SPN 412, FMI 0/15). This fault code sets when exhaust gas recirculation (EGR) temperature is above the normal operating range at the least severe level. This page summarises what the manual contains so a technician can confirm it matches the code before downloading.
Official document details
| Brand | Cummins |
| Model coverage | ISM & ISX CM871 (2007-09) |
| System / group | ISM CM871 (2007-09) / DTCs |
| Circuit | ISX and ISM Exhaust Gas Recirculation Temperature Sensor Circuit |
| Fault identifiers | SPN 412 · FMI 0/15 |
| Source | TruckFaultCodes.com (© 2017) |
| Pages | 3 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Cummins fault code 2961 overview
This fault code sets when exhaust gas recirculation (EGR) temperature is above the normal operating range at the least severe level. The variable-resistor EGR temperature sensor measures gas temperature after the EGR cooler and the ECM uses the value for engine protection and emissions control. The engine must be loaded to trigger this code. Verify the ECM calibration is correct.
The document lists possible causes including:
- Malfunctioning EGR differential pressure tubes or a damaged EGR valve
- A stuck open turbocharger control valve
- A low EGR differential pressure or EGR valve position sensor reading
- Low coolant level, high coolant temperature, or incorrect coolant mixture
- A fouled EGR cooler or stuck closed variable geometry turbocharger
Document table of contents
- Description
- Shop Talk
- Component Location
- Troubleshooting Steps
Applicable truck models covered
This procedure applies to Cummins ISM and ISX engines built on the CM871 (2007-09) electronic control platform, as fitted by truck makers using this Cummins driveline. The EGR temperature sensor is on the EGR connection tube between the EGR valve and the air intake connection. For wiring, connector, and CPL detail, refer to the Cummins official engine support site or the OEM service manual.
Who needs this Cummins fault code 2961 manual
Fleet technicians and workshop owners diagnosing high EGR temperature on ISM or ISX CM871 engines use this reference to follow the factory step order instead of guessing at the EGR temperature sensor circuit. The full PDF is available in the DiagTechPro manuals library, and a free account is required to download.
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