# Service bulletin TSB260081

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 bulletin
- NHTSA id: 11037032
- Published by NHTSA: 2026\-09\-04
- Manufacturer's number: TSB260081
- Manufacturer's date: 2026\-08\-18
- NHTSA component: ENGINE

## NHTSA's summary

This Technical Service Bulletin describes the verification and resolution steps for the engine control module calibration of certain L9 and X12 engines which may contain calibration tuning causing the Road Speed Governor to over or under shoot programmed speed by 11 kph/7 mph, resulting in road speed not meeting/matching the Road Speed Governor setting. This is an update to a previously submitted communication.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11037032-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11037032-9999.pdf)

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

## Components

Engine

## Vehicles listed

- CUMMINS L9
- CUMMINS X12
- CUMMINS X15

JSON: [/v1/bulletins/11037032](/v1/bulletins/11037032)

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