fault code 2449 DTCs is the Cummins ISX11.9 CM2250 troubleshooting document for VGT Actuator Controller – Out of Calibration (SPN 641, FMI 13). This 14-page factory guide explains the circuit, the conditions that set the code, and the guided repair steps used with the INSITE electronic service tool. The variable geometry turbocharger (VGT) is electronic activated by the VGT actuator.
Official document details
| Brand | Cummins |
| Model coverage | ISX11.9 CM2250/ISB6.7 CM2250/ISC8.3 and ISL9 CM2250/ISX15 CM2250 |
| System / group | ISX11.9 CM2250 (2010-12) / DTCs |
| Fault code | 2449 (PID S027) |
| SPN / FMI | 641 / 13 |
| Warning lamp | Red |
| Bulletin number | 2883445 |
| Revision | Last modified 11-Jun-2010 |
| Pages | 14 |
| File size | 0.2 MB |
| Format | |
| Language | English |
fault code 2449 DTCs table of contents
- Overview and circuit description
- 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
This troubleshooting procedure applies to Cummins ISX11.9 CM2250/ISB6.7 CM2250/ISC8.3 and ISL9 CM2250/ISX15 CM2250 engines. The VGT actuator is located on the turbocharger bearing housing. The document states the code is set when internal position reference is not detected during the initial power on due to incorrect installation of the vgt actuator. When the code is active, the red warning lamp is illuminated when this diagnostic runs and fails. Full specifications and procedure references are published by Cummins on the Cummins official website.
Who needs this fault code 2449 DTCs manual
Diesel technicians and workshop owners diagnosing Out of Calibration on ISX11.9 CM2250 engines need this reference. The guide walks through each guided step and the INSITE electronic service tool tests required to validate the repair and clear the code. Each guided step lists the keyswitch position, the required action, and the YES or NO branch that follows. The associated procedures table cross-references the component repair bulletins for the ISX11.9 and ISX15 CM2250 platforms. Following the steps in the documented order helps confirm the root cause before any parts are replaced. The clearing conditions section explains how to verify the repair so the code returns to inactive status.
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