Cummins fault code 2345 is documented on this DiagTechPro library page for Cummins ISM CM871 (2007-09) engines, where it flags a Turbocharger 1 Speed – Abnormal Rate Of Change condition (PID P103, SPN 103, FMI 10/10, Amber lamp). 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 2345 overview
Cummins defines this code as “TURBOCHARGER 1 SPEED – ABNORMAL RATE OF CHANGE” on the Turbocharger 1 Speed Circuit. The turbocharger speed sensor is a variable reluctance speed sensor. It consists of a coil of wire and an iron core. The target on the turbocharger shaft is a ground flat in the center of the shaft. As the flat on the turbocharger shaft passes the speed sensor, a signal is generated. The electronic control module (ECM) interprets this signal and converts it to a turbocharger speed reading.
Verify the electronic control module (ECM) calibration is correct. If necessary, recalibrate the ECM.
Official document details
| Brand | Cummins |
| Model coverage | Cummins ISM CM871 (2007-09); Cummins ISX CM871 (2007-09) |
| System / Group | Turbocharger 1 Speed Circuit — ISM CM871 fault codes |
| Fault code | 2345 (SPN 103, FMI 10/10) |
| 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 2345 on the Turbocharger 1 Speed Circuit. 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 2345 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 103 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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