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Service bulletin TIB-43-034

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 id10055456
Published by NHTSA2014-05-28
Manufacturer's numberTIB-43-034
Manufacturer's date2014-03-10
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL

NHTSA's summary

KENWORTH: INFORMATION PROVIDED REGARDING NEW AFTERMARKET SYSTEM AND PROCESS REQUIREMENTS, ON THE FUNCTIONS, VEHICLE SPEED LIMITER (VSL), ENGINE IDLE SHUTDOWN TIMER (EIST), THAT ARE PROGRAMMED, WITH GREENHOUSE GAS (GHG) RESTRICTIONS. *PE

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine, Exhaust and emissions

Vehicles listed
KENWORTH KENWORTH

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