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Service bulletin C1990

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 id10133069
Published by NHTSA2018-04-16
Manufacturer's numberC1990
Manufacturer's date2018-03-23
NHTSA componentENGINE; ELECTRICAL SYSTEM

NHTSA's summary

This Campaign is being issued to address a calibration update in certain ISL G CM2180 engines. This document enables authorized repair locations to calibrate the engine control module (ECM) to the latest revision.

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

Electrical system, Engine

Vehicles listed
CUMMINS WESTPORT ISL G

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