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Service bulletin C2115

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 id10162939
Published by NHTSA2019-07-22
Manufacturer's numberC2115
Manufacturer's date2019-06-13
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

This field action authorizes certified repair locations to upfit certain ISB CM2350 engines with an improved Selective Catalytic Reduction (SCR) Catalyst, if the engine meets certain criteria. For MY2013 thru MY2014 engines that qualify for a new SCR Catalyst, a new wiring harness connector plug, and a calibration update will be required.

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

Vehicles listed
CUMMINS ISB

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