This Cummins code 2346 document is a troubleshooting PDF for Fault Code 2346 on CM2250 engines, focused on turbocharger turbine intake temperature derate logic. It explains that the exhaust gas temperature value is calculated by the ECM, not measured by a physical sensor in this system, and outlines INSITE™ checks, calibration review, and fault clearing.
Official Cummins code 2346 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; ISC8.3 and ISL9 CM2250; ISX11.9 CM2250; ISX15 CM2250; also listed with ISL8.9 CM2150 and ISM11 CM876 in associated procedures |
| System/Group | DTCs; Electronic Control Module; Turbocharger Turbine Intake Temperature |
| Publication no. | 4022254 for ISB6.7 CM2250; associated bulletin numbers also include 4022250, 4022257, 2883445, 4022190, and 4022196 |
| Year/Revision | Last Modified: 11-Jun-2010 and 20-Jul-2010 |
| Pages | 6 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- FAULT CODE 2346
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the fault codes
- Guided Step 1A – Check for active turbocharger fault codes
- Guided Step 2 – Check ECM calibration and clear fault codes
- Guided Step 2A – Check if an ECM calibration update is available
- Guided Step 2B – Disable the fault code
Applicable truck models
This file applies to Cummins engine platforms named in the procedure, including ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX11.9 CM2250, and ISX15 CM2250, with associated ECM calibration references for ISL8.9 CM2150 and ISM11 CM876. The procedure describes Fault Code 2346, SPN 2789, FMI 0/15, where turbocharger turbine intake temperature is data valid but above the normal operating range at the least severe level. The ECM logs the fault when the calculated turbine intake temperature exceeds a calibratible value, then limits fuel to reduce exhaust gas temperature entering the turbocharger. For official engine and service information, visit Cummins.
Who needs this Cummins code 2346 manual
Workshop owners, diesel technicians, and fleet mechanics need this Cummins code 2346 manual when INSITE™ shows active or repeated inactive counts for this informational derate fault. The document is useful for confirming normal engine protection behavior, checking ECM calibration status, and clearing the code after the required idle validation.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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