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Service bulletin 418

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 id10024100
Published by NHTSA2008-03-08
Manufacturer's number418
Manufacturer's date2008-01-09
NHTSA componentENGINE AND ENGINE COOLING:ENGINE

NHTSA's summary

KENWORTH - HIGH ENGINE AIR INTAKE TEMPERATURE, ENGINE DE-RATE AND AIR INTAKE BOOT ON T660 W/ A [CHECK ENGINE] LIGHT WITH FAULT CODES 155, 2346, 2347, 2451, OR 2964. *NJ

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

Vehicles listed
KENWORTH T6602006 to 2007

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