Cummins fault code 2449 is documented on this DiagTechPro library page for Cummins ISM CM871 (2007-09) engines, where it flags a VGT Actuator Controller – Out Of Calibration condition (PID S027, SPN 641, FMI 13/13, Red lamp). This 5-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 2449 overview
Cummins defines this code as “VGT ACTUATOR CONTROLLER – OUT OF CALIBRATION” on the VGT Actuator Circuit. The variable geometry turbocharger (VGT) is electronically activated by the VGT actuator. The VGT actuator is a smart device that receives information via the J1939 data link from the primary engine electronic control module (ECM). The VGT actuator performs its own diagnostics and reports errors back to the primary engine ECM using the J1939 data link.
The document’s shop talk section highlights the following:
- If the turbocharger actuator has just been replaced and this fault code is.
- Foreign material in the VGT turbocharger can prevent the sliding nozzle.
Official document details
| Brand | Cummins |
| Model coverage | Cummins ISM CM871 (2007-09); Cummins ISX CM871 (2007-09) |
| System / Group | VGT Actuator Circuit — ISM CM871 fault codes |
| Fault code | 2449 (SPN 641, FMI 13/13) |
| Source | TruckFaultCodes.com Cummins fault code reference (© 2017) |
| Pages | 5 |
| File size | 0.3 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 2449 on the VGT Actuator 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 2449 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 641 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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