Service bulletin TSB220173
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 | 11030957 |
| Published by NHTSA | 2026-04-07 |
| Manufacturer's number | TSB220173 |
| Manufacturer's date | 2026-03-21 |
| NHTSA component | FUEL/PROPULSION SYSTEM |
NHTSA's summary
This Technical Service Bulletin describes the verification and resolution steps for the high voltage DC/DC converters of the battery electric system which may be labelled with the wrong part number, resulting in confusion when replacing components and the possibility that some high voltage DC/DC converters may be programmed incorrectly. 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
Fuel system
| CUMMINS BES |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.