# Service bulletin ITS61079

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: 11030369
- Published by NHTSA: 2026\-03\-31
- Manufacturer's number: ITS61079
- Manufacturer's date: 2026\-03\-20
- NHTSA component: FUEL/PROPULSION SYSTEM; ENGINE

## NHTSA's summary

Instructions to remove DEF sensor bypass calibration from engine ECM and new sensor installation AR \- 22inch DEF tank \- CA emissions.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030369-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030369-9999.pdf)

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

## Components

Engine, Fuel system

## Vehicles listed

- 2021 MCI D45CRTLE
- 2020 to 2021 MCI J3500
- 2017 to 2019 MCI J4500

JSON: [/v1/bulletins/11030369](/v1/bulletins/11030369)

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