Service bulletin TSB230020
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 11034577 |
| Published by NHTSA | 2026-07-07 |
| Manufacturer's number | TSB230020 |
| Manufacturer's date | 2026-06-16 |
| NHTSA component | ENGINE |
NHTSA's summary
This Technical Service Bulletin describes the verification and resolution of the issue of Variable geometry turbocharger (VGT) actuators that have been improperly diagnosed as faulty after incorrect install or calibration steps were performed. This is an update to a previously submitted communication.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Engine
| CUMMINS B6.7 | |
|---|---|
| CUMMINS ISB6.7 | |
| CUMMINS ISL9 | |
| CUMMINS L9 | |
| CUMMINS X12 | |
| CUMMINS X15 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.