Cummins fault code 2198 is documented on this DiagTechPro library page for Cummins ISM CM871 (2007-09) engines, where it flags the Vgt Actuator Driver Circuit – Root Cause Not Known condition (PID S027, SPN 641, FMI 11/11, 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 2198 overview
Cummins identifies this code as “Vgt Actuator Driver Circuit – Root Cause Not Known” on the VGT Actuator Driver Circuit. The variable geometry turbocharger (VGT) is electronically activated by the VGT actuator. The VGT actuator is a smart device and receives information via the J1939 datalink from the primary engine electronic control module (ECM). The VGT actuator performs its own diagnostics and reports failures back to the primary engine ECM using the J1939 datalink. The ECM then decodes the error message and converts it to a fault code.
Official document details
| Brand | Cummins |
| Model coverage | Cummins ISM CM871 (2007-09); Cummins ISX CM871 (2007-09) |
| System / Group | VGT Actuator Driver Circuit — ISM CM871 fault codes |
| Fault code | 2198 (SPN 641, FMI 11/11) |
| PID | S027 |
| Warning lamp | Amber |
| Source | TruckFaultCodes.com Cummins fault code reference (© 2017) |
| Pages | 3 |
| File size | 0.2 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 2198. Always confirm engine calibration and use a Cummins diagnostic tool such as INSITE to read live data before replacing parts. Full specifications are published on the Cummins official website.
Who needs this Cummins fault code 2198 manual
Heavy-duty truck technicians, fleet workshops and owner-operators diagnosing an electronic control module warning on ISM CM871 engines use this sheet to verify the fault 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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