Cummins fault code 2347 is documented on this DiagTechPro library page for Cummins ISM CM871 (2007-09) engines, where it flags a Turbocharger Compressor Outlet Temperature (Calculated) – Data Valid But Above Normal Operational Range – Least Severe Level condition (SPN 2790, FMI 0/15). This 3-page PDF reproduces the manufacturer description, shop talk, component location and step-by-step troubleshooting so technicians can confirm and clear the code.
Cummins fault code 2347 overview
Cummins defines this code as “TURBOCHARGER COMPRESSOR OUTLET TEMPERATURE (CALCULATED) – DATA VALID BUT ABOVE NORMAL OPERATIONAL RANGE – LEAST SEVERE LEVEL” on the Electronic Control Module. The turbocharger compressor outlet air temperature is calculated by the ECM. Turbocharger compressor outlet air temperature is derived by the ECM, based on engine operating conditions such as turbocharger compressor inlet air temperature, barometric pressure, turbocharger speed, engine speed, intake manifold air temperature, and intake manifold pressure.
The document’s shop talk section highlights the following:
- Air intake leaks allowing hot under-hood air to enter the intake system.
- Faulty intake manifold pressure readings.
- High turbocharger speed readings.
- Fault barometric pressure readings.
- Stuck variable geometry turbocharger.
Official document details
| Brand | Cummins |
| Model coverage | Cummins ISM CM871 (2007-09); Cummins ISX CM871 (2007-09) |
| System / Group | Electronic Control Module — ISM CM871 fault codes |
| Fault code | 2347 (SPN 2790, FMI 0/15) |
| Source | TruckFaultCodes.com Cummins fault code reference (© 2017) |
| Pages | 3 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification (PID, SPN, FMI, lamp)
- Description
- Shop Talk
- Component Location
- Troubleshooting Steps
Applicable truck models and engines
This document applies to Cummins ISM CM871 (2007-09); Cummins ISX CM871 (2007-09) equipped diesel engines that log Fault Code 2347 on the Electronic Control Module. Always confirm engine calibration and use a Cummins diagnostic tool such as INSITE to read live data before starting repairs. Full engine specifications and service information are published on the Cummins official website.
Who needs this Cummins fault code 2347 manual
Heavy-duty truck technicians, fleet workshops and owner-operators diagnosing an electronic control module warning on ISM CM871 engines will use this sheet to verify SPN 2790 before parts are replaced.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download.
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