# Service bulletin 02\-171\-18R

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: 10143727
- Published by NHTSA: 2018\-08\-20
- Manufacturer's number: 02\-171\-18R
- Manufacturer's date: 2018\-07\-26
- NHTSA component: ENGINE; ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING

## NHTSA's summary

This bulletin provides a service procedure for installation of additional foam packing to enhance performance of the Ambient Air Temperature Sensor. The additional foam better insulates the sensor from engine compartment heat which may lead to setting a DTC P0072. This information is applicable to models with or without the Active Grill Shutter \(AGS\) system.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10143727-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10143727-0001.pdf)

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

## Components

Engine, Cooling system

## Trouble codes named

P0072

## Vehicles listed

- 2015 to 2018 SUBARU LEGACY
- 2015 to 2018 SUBARU OUTBACK

## Other bulletins for the same vehicles and component

- [11\-152\-14](/bulletins/10068689.md), 2016-06-02, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS. SUMMARY TO BE PROVIDED ON A FUTURE DATE.

JSON: [/v1/bulletins/10143727](/v1/bulletins/10143727)

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