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Service bulletin 2015FA12 Rev B

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 id10155540
Published by NHTSA2019-04-01
Manufacturer's number2015FA12 Rev B
Manufacturer's date2016-04-28
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Customer satisfaction campaign to installs a new SID that disables the motor speed sensor diagnostic check during shutdown

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

Vehicles listed
ALLISON H 40 EP TRANSMISSION
ALLISON H 50 EP TRANSMISSION

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