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Service bulletin C1651C

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 id10086575
Published by NHTSA2016-12-19
Manufacturer's numberC1651C
Manufacturer's date2016-03-28
NHTSA componentENGINE

NHTSA's summary

THIS IN-SHOP CAMPAIGN AUTHORIZES THE RECALIBRATION OF THE ENGINE CONTROL MODULE (ECM) OF CERTAIN ENGINES ANY TIME THE UNIT IS IN FOR MAINTAINENCE OR REPAIRS. THIS IS AN UPDATE TO A PREVIOUS 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

Engine

Vehicles listed
CUMMINS ISX15

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