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Service bulletin KC-478

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10207633
Published by NHTSA2022-02-04
Manufacturer's numberKC-478
Manufacturer's date2022-01-26
NHTSA componentENGINE AND ENGINE COOLING; EQUIPMENT

NHTSA's summary

Variable Geometry Turbocharger ( VGT ) Function Test ( 2551-08-03-02 ), OBD13 Model Year ( MY ) 2014 And Newer

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, Equipment and accessories

Vehicles listed
VOLVO VAH2014 to 2022
VOLVO VHD2014 to 2022
VOLVO VN2014 to 2022
VOLVO VNL2014 to 2022
VOLVO VNM2014 to 2021
VOLVO VNR2017 to 2022
VOLVO VNX2014 to 2021
VOLVO VT2014 to 2016

Listing a model year does not mean every vehicle of it is concerned: the document says which.