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Service bulletin TSB170122-112720

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 id10127393
Published by NHTSA2018-01-29
Manufacturer's numberTSB170122-112720
Manufacturer's date2017-11-28
NHTSA componentFUEL SYSTEM, DIESEL; ENGINE

NHTSA's summary

This Technical Service Bulletin describes the verification and resolution of White Residue / Diesel Exhaust Fluid (DEF) Staining On Exhaust as caused by urea not being decomposed/atomized to gaseous state completely. Presence of white staining/DEF staining on the exhaust stack does not impact performance of engine and aftertreatment, impact the durability of the aftertreatment, nor increase DEF consumption.

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, Fuel system

Vehicles listed
CUMMINS ISX15
CUMMINS X15

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