This Cummins VGT actuator troubleshooting document covers Fault Code 2449 for the ISB6.7 CM2150 VGT actuator controller out of calibration condition. It explains when the diagnostic runs, what sets the red STOP ENGINE lamp, and how the guided checks use INSITE™ and turbocharger actuator inspections.
Official Cummins VGT actuator troubleshooting document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150, with references to ISB, ISC, and ISL CM2150 service procedures |
| System/Group | ISB6.7 CM2150 (2007-09) / DTCs; VGT Actuator Circuit |
| Publication no. | Not shown in the extract |
| Year/Revision | Last Modified: 04-Feb-2011; guided procedure page shows 10-Aug-2010 |
| Pages | 15 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- 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
- FAULT CODE 2449 – VGT Actuator Controller – Out of Calibration
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the fault codes and previous service history.
- Guided Step 2 – Check the VGT actuator.
- Guided Step 3 – Clear the fault code.
Applicable truck models
This file applies to Cummins ISB6.7 CM2150 engines in the 2007-09 DTC group and also points technicians to related ISB, ISC, and ISL CM2150 service manual procedures. The fault is for SPN 641, FMI 13/13, where the VGT actuator controller is out of calibration because the internal position reference is not detected during initial key-on. The actuator is located on the turbocharger bearing housing and communicates with the primary engine ECM over the J1939 data link. For factory engine information, visit Cummins official website.
Who needs this Cummins VGT actuator troubleshooting manual
This Cummins VGT actuator troubleshooting manual is intended for mechanics diagnosing active Fault Code 2449, recent VGT actuator replacement problems, sector gear binding, connector damage, or turbocharger calibration concerns. Workshop owners can use it to confirm the required inspection flow before assigning work that may involve actuator removal, harness repair, ECM calibration review, or aftertreatment checks.
The procedure starts by checking active fault codes and previous service history with INSITE™ electronic service tool, including key cycles with a 30 second wait. It then directs inspection of the VGT actuator connector pins for corrosion, bent pins, pushed back terminals, moisture, damaged seals, debris, shell damage, wire insulation damage, and locking tab damage. Later checks cover the actuator gear, turbocharger sector gear teeth, sector gear movement with sector gear travel gauge Part Number 4919281, actuator output gear movement when connected to the engine wiring harness, and active Fault Code 2449 after reinstallation.
The repair path also includes aftertreatment initial check Procedure 014-013 because progressive damage may have occurred when VGT actuation and active or stationary regeneration were disabled. The final steps review ECM Calibration Revision History, compare the installed ECM code and revision, apply Procedure 019-032 if calibration is needed, and operate the engine under the stated clearing conditions.
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