# 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.

- Type: Service campaign
- NHTSA id: 11037030
- Published by NHTSA: 2026\-09\-04
- Manufacturer's number: C7290
- Manufacturer's date: 2026\-08\-29
- Campaign id or software version: C7290
- NHTSA component: ENGINE

## 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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11037030-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11037030-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- CUMMINS B6.7
- CUMMINS L9

JSON: [/v1/bulletins/11037030](/v1/bulletins/11037030)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20campaign%20C7290&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11037030&vehicle=Service%20campaign%20C7290)