# Service bulletin TSB25001

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: 11012348
- Published by NHTSA: 2025\-01\-06
- Manufacturer's number: TSB25001
- Manufacturer's date: 2025\-01\-18
- NHTSA component: FUEL/PROPULSION SYSTEM
- Manufacturer's system: def

## NHTSA's summary

If a DEF sensor fails, validate that the Coolant Control Valve is plumbed so that the coolant flows towards the DEF Tank. If it is plumbed incorrectly, replace the coolant control valve along with DEF assy. Follow the attached instructions for inspection.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11012348-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11012348-9999.pdf)

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

## Components

Fuel system

## Vehicles listed

- 2017 to 2021 ROSENBAUER AVENGER
- 2017 to 2024 ROSENBAUER COMMANDER
- 2017 to 2024 ROSENBAUER WARRIOR

JSON: [/v1/bulletins/11012348](/v1/bulletins/11012348)

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