# Service bulletin CSA\-036

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: 10253713
- Published by NHTSA: 2024\-05\-01
- Manufacturer's number: CSA\-036
- Manufacturer's date: 2024\-04\-19
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

Faulty DEF sensors that due to shortage were not replaced. Instead engine software was temporarily modified to account for continued operation with a faulty sensor until replacement sensors were available. This campaign will install an engine control module calibration as well as confirm and/or install a new DEF header.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-10253713-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-10253713-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2020 to 2022 TIFFIN ALLEGRO BREEZE
- 2016 to 2021 TIFFIN ALLEGRO BUS
- 2017 to 2023 TIFFIN PHAETON
- 2018 to 2021 TIFFIN ZEPHYR

JSON: [/v1/bulletins/10253713](/v1/bulletins/10253713)

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