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Service bulletin TSB180047-060420

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 id10143386
Published by NHTSA2018-08-06
Manufacturer's numberTSB180047-060420
Manufacturer's date2018-06-04
NHTSA componentEQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:ENGINE:DIESEL

NHTSA's summary

This Technical Service Bulletin describes the verfication and resolution of Diesel exhaust fluid (DEF) dosing unit heater elements becoming discolored caused by chemical reactions between DEF and the aluminum housing. Also the DEF dosing valve inlet screen can become plugged with debris when corrosion on the DEF dosing unit heating element flakes off typically leading to FC1682, FC3574, and/or FC3596. This is a revision to a previously submitted communication.

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, Equipment and accessories, Fuel system

Vehicles listed
CUMMINS B6.7
CUMMINS L9
CUMMINS X15

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