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Service bulletin 15-278-21

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 id10188196
Published by NHTSA2021-03-04
Manufacturer's number15-278-21
Manufacturer's date2021-02-25
NHTSA componentELECTRICAL SYSTEM; EQUIPMENT

NHTSA's summary

This bulletin provides additional details and helpful hints to follow when diagnosing a Telematics system DTC B2A01.

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

Electrical system, Equipment and accessories

Trouble codes named

B2A01

Vehicles listed
SUBARU SUBARU

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