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Service bulletin C2740

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 id10244893
Published by NHTSA2023-11-06
Manufacturer's numberC2740
Manufacturer's date2023-10-26
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

This campaign is being issued to recalibrate the Engine Control Module (ECM) on certain MY2018 - MY2021 ISX CM2250 SN engines. This campaign enables authorized repair locations to recalibrate the ECM to the latest revision. This calibration update may provide improvements in performance to the engines emissions system.

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 ISX15

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