fault code 2451 DTCs is documented in this official Cummins ISX11.9 CM2250 diagnostic and troubleshooting manual. The 12-page PDF explains the Turbocharger Turbine Intake Temperature – Data Valid But Above Normal Operating Range – Moderately Severe Level condition on the turbocharger turbine intake temperature circuit, including the SPN, FMI and PID identifiers a technician reads with the Cummins INSITE electronic service tool.
fault code 2451 DTCs document details
| Brand | Cummins |
| Model coverage | ISX11.9 CM2250, ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, and ISX15 CM2250 |
| System / group | Turbocharger turbine intake temperature circuit |
| Fault code | 2451 (PID S384) |
| SPN | SPN 2789 |
| FMI | FMI 16 |
| Warning lamp | None |
| Pages | 12 |
| Revision | Last modified 20-Jul-2010 |
| Format | |
| Language | English |
Document table of contents
- Circuit description and component location
- Conditions for running the diagnostics
- Conditions for setting the fault code
- Action taken when the fault code is active
- Conditions for clearing the fault code
- Shop Talk and possible causes
- Associated procedures table
- Guided troubleshooting steps
Applicable truck models and engines
This document applies to the ISX11.9 CM2250, ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, and ISX15 CM2250 engine families running the CM2250 electronic control module. When SPN 2789 / FMI 16 sets, fuel is limited in an attempt to decrease the exhaust gas temperature entering the turbocharger. Coverage and part numbers should always be verified against current service data on the Cummins official support site before ordering components.
Who needs this fault code 2451 DTCs manual
Fleet technicians, mobile mechanics and workshop owners use this code 2451 DTCs reference to confirm the engine protection system diagnosis before replacing parts, and to follow the same clearing steps Cummins publishes for INSITE. Reading the live data and freeze-frame with INSITE before any parts replacement helps avoid unnecessary repairs and repeat shop visits. The revision date of 20-Jul-2010 and the SPN, FMI and PID values make it a reliable bench reference for ISX11.9 CM2250 diagnostics.
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