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Service bulletin T1479E

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 id10085223
Published by NHTSA2016-11-30
Manufacturer's numberT1479E
Manufacturer's date2016-07-29
NHTSA componentEQUIPMENT

NHTSA's summary

AS NEW ECM CALIBRATIONS ARE INSTALLED, THE COMPATIBILITY OF THE ECM CALIBRATION AND THE SCR CATALYST MUST BE MAINTAINED. THIS TEMPORARY REPAIR PRACTICE ALLOWS FOR THE INSPECTION OF THE SCR CATALYST PER TSB130099 WHEN A NEW ECM CALIBRATION IS INSTALLED DURING A REPAIR EVENT. THIS IS AN UPDATE TO A PREVIOUSLY SUBMITTED 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 ISX12

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