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Service bulletin T1629A

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 id10090121
Published by NHTSA2017-02-02
Manufacturer's numberT1629A
Manufacturer's date2015-08-14
NHTSA componentEQUIPMENT

NHTSA's summary

THIS TEMPORARY REPAIR PRACTICE IS BEING ISSUED TO ADDRESS UNITS THAT HAVE FOUND FAULT CODE 1887, 3545, AND/OR 3583 ACTIVE OR INACTIVE. THE IMPLEMENTATION OF THIS TRP WILL CORRECT THE ISSUE OF LIQUID IMPINGMENT BY APPLYING A WATER SHIELD OVER THE SCR OUTLET NOX SENSOR. THIS IS A REVISION TO A PREVIOUSLY RELEASED COMMUNICATION.

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

Equipment and accessories

Vehicles listed
CUMMINS ISB6.7
CUMMINS ISL9
CUMMINS ISX12
CUMMINS ISX15

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