Cummins fault code 2451 is documented on this DiagTechPro library page for Cummins ISM CM871 (2007-09) engines, where it flags a Turbocharger Turbine Inlet Temperature (Calculated) condition (PID SPN, SPN 2789, FMI 0/16). This 4-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 2451 overview
Cummins defines this code as “TURBOCHARGER TURBINE INLET TEMPERATURE (CALCULATED) – DATA VALID BUT ABOVE NORMAL OPERATIONAL RANGE – MODERATELY SEVERE LEVEL” on the Electronic Control Module. The exhaust gas temperature is calculated by the electronic control module (ECM). Exhaust gas temperature is derived by the ECM, based on engine operating conditions such as intake manifold air temperature, engine speed, injection timing, intake manifold pressure, and fuel flow.
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 | 2451 (SPN 2789, FMI 0/16) |
| Source | TruckFaultCodes.com Cummins fault code reference (© 2017) |
| Pages | 4 |
| File size | 0.2 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 2451. Always confirm engine calibration and use a Cummins diagnostic tool such as INSITE to read live data before starting repairs. Full specifications are published on the Cummins official website.
Who needs this fault code 2451 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 the fault 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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