A9020442032113_3

90 Outside air temperature reading: general information
90 20 44 2032113/3 April 24, 2020. Supersedes Technical Service Bulletin Group 90 number 19-19 dated June
21, 2019 for reasons listed below.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
All
2008 - 2021
All
Not Applicable
Condition
REVISION HISTORY
Revision
Date
Purpose
3
-
Revised header (Added MY 2021 and Audi e-tron quattro)
2
06/21/2019
Revised header (Added MY 2015 to 2020)
1
12/07/2012
Initial publication
Customer states:
 The outside ambient temperature display is incorrect.
Technical Background
To achieve a smoothening effect of the displayed outside ambient temperature, the value shown does not
instantaneously follow the temperature sensor measurement. The display will not change faster than 4° F (2° C)
per minute. This concept applies to both falling and rising temperatures.
A programming strategy is also implemented to avoid incorrect readings on a parked vehicle, due to the
temperature sensor being affected by outside influences such as radiant heat from the engine bay, elevated road
surface temperatures, etc. Incorrect readings are avoided through the following logic:
 After switching the ignition on, temperature changes are only shown after 30 seconds for a stationary vehicle
(vehicle speed = zero and engine switched off).
 Only when the vehicle drives faster than 12 mph (20 km/h), rising temperature values are displayed during the
first 3 miles (5 km).
 If the measured ambient temperature is above the displayed value but falling, the display is not changed.
 When the coolant temperature reaches 104° F (40° C) and the speed drops to under 12 mph (20 km/h), only
falling ambient temperature values are shown. For example, in stop and go traffic when the vehicle is often
below 12 mph (20 km/h), it can take some time before the displayed temperature is correct.
Page 1 of 2
© 2020 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.
 If the conditions above are noted during these typical driving scenarios, the sensor is not at fault and does not
need to be replaced.
Production Solution
Not applicable.
Service
Explain the operation to the customer.
Warranty
This TSB is informational only and not applicable to any Audi Warranty.
Additional Information
All part and service references provided in this TSB (2032113) are subject to change and/or removal. Always
check with your Parts Department and/or ETKA for the latest information and parts bulletins. Please check the
Repair Manual for fasteners, bolts, nuts, and screws that require replacement during the repair.
©2020 Audi of America, Inc. All rights reserved. Information contained in this document is based on the latest
information available at the time of printing and is subject to the copyright and other intellectual property rights of
Audi of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in
any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these
materials be modified or reposted to other sites without the prior expressed written permission of the publisher.
Page 2 of 2
© 2020 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.