# Service bulletin TSB260017

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: 11037909
- Published by NHTSA: 2026\-10\-05
- Manufacturer's number: TSB260017
- Manufacturer's date: 2026\-09\-15
- NHTSA component: ENGINE

## NHTSA's summary

This Technical Service Bulletin describes the verification and resolution steps for the engine control module calibration which may contain an incorrect trim setting for the Aftertreatment Regeneration Permit Switch, resulting in the Aftertreatment System not completing regenerations as needed. 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-11037909-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11037909-9999.pdf)

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

## Components

Engine

## Vehicles listed

- CUMMINS B6.7
- CUMMINS L9
- CUMMINS X12
- CUMMINS X15

JSON: [/v1/bulletins/11037909](/v1/bulletins/11037909)

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