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Service campaign C7290

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 campaign
NHTSA id11037903
Published by NHTSA2026-10-05
Manufacturer's numberC7290
Manufacturer's date2026-09-02
Campaign id or software versionC7290
NHTSA componentENGINE

NHTSA's summary

This Warranty Field Campaign describes the recalibration steps for the engine control module calibration of certain B6.7 and L9 engines which may not be tuned to accept an External Acceleration Request (XAR) from DTNA’s Adaptive Cruise Control (ACC) System, resulting in behavior from the cruise control system whereby the vehicle slows down once the gap to the leading vehicle is is too small but then speeds back up to cruise speed once the gap is sufficient. This process repeats until cruise is canceled or the vehicle maintains sufficient distance. This is an update to a previously submitted communication.

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 B6.7
CUMMINS L9

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