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Service bulletin C1990A

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 id10249560
Published by NHTSA2024-02-02
Manufacturer's numberC1990A
Manufacturer's date2024-01-16
NHTSA componentENGINE AND ENGINE COOLING

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 available on QuickServe® Online. The new calibration may improve engine performance, and reduce the occurrence of fuel pressure controller and fuel control valve failures.

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 ISL

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