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Service bulletin TIB-43-032

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 id10054570
Published by NHTSA2014-02-05
Manufacturer's numberTIB-43-032
Manufacturer's date2013-10-07
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM

NHTSA's summary

KENWORTH: SOME VEHICLES HAVE DEF LINES ROUTED INCORRECTLY. ERROR CODES P3859 (MX ENGINE) AND P3568 (CUMMINS), DEF DOSER IS NOT RESPONDING OR IS OUT OF ADJUSTMENT FAULT. MODEL INCLUDES T660/T700 AERO MANUFACTURED BEGINNING 04/08/2013 ENDING 06/28/2013. *JS

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

Trouble codes named

P3568, P3859

Vehicles listed
KENWORTH KENWORTH

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