Service bulletin SM1906
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 | 10201697 |
| Published by NHTSA | 2021-10-01 |
| Manufacturer's number | SM1906 |
| Manufacturer's date | 2019-12-11 |
| NHTSA component | POWER TRAIN |
NHTSA's summary
The intent of Service Memorandum SM1906 is to make Blue Bird dealers aware that Cummins has released a calibration update improvement to reduce occurrence of “Engine fault codes 3555 and 3556” on Cummins diesel engines with the following base ECM calibrations, "HC80145 thru HC80250 and HB80104 thru HC80195"
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
Transmission and driveline
| BLUE BIRD ALL AMERICAN | 2017 to 2019 |
|---|---|
| BLUE BIRD ALL AMERICAN SCHOOL BUS | 2020 |
| BLUE BIRD ALL AMERICAN TRANSIT BUS | 2020 |
| BLUE BIRD VISION | 2017 to 2019 |
| BLUE BIRD VISION SCHOOL BUS | 2020 |
| BLUE BIRD VISION TRANSIT BUS | 2020 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.