A9123812058769_6

Technical Service Bulletin
91 Parking aid sporadically does not work, DTC B107BF0 or B10FCF0 stored in the driver assist systems
91 23 81 2058769/6 March 17, 2023. Supersedes Technical Service Bulletin Group 91 number 21-51 dated
November 17, 2021, for reasons listed below.
Model(s)
Year
e-tron quattro
2019
2021 – 2024
A6, A7, A8, Q7,
and Q8
2019 – 2024
A8 e quattro
2020 – 2021
A7 e quattro
2020 – 2022
A6 allroad, S6,
S7, RS 7, S8, etron Sportback
quattro, SQ7,
SQ8, RS Q8
2020 – 2024
RS 6 Avant
2021 -2024
e-tron S quattro,
e-tron GT, RS etron GT
2022 - 2024
VIN Range
Vehicle-Specific Equipment
All
Not applicable
Condition
REVISION HISTORY
Revision
Date
Purpose
6
-
Revised header (added Model Years)
Revised Warranty (Removed warranty table, TSB is a tech tip)
5
11/17/21
Revised header (Added Model)
4
05/18/2021
Revised header (Added Model Years)
Customer states:
• The warning message “Front/rear parking aid: Sensor view restricted because of environmental factors No
obstacle warning” appears in the instrument cluster relating to the parking aid system.
Workshop findings:
• The message is reproducible.
Page 1 of 3
© 2023 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.
Technical Service Bulletin
One of the following DTCs are stored in the control module for driver assist systems, J1121 (address word 00A5):
• DTC B107BF0 (Rear parking aid sender, malfunction because of environment influences) with symptom code
233479 or 233473.
Or
•
DTC B10FCF0 (Front parking aid sender, malfunction because of environment influences) with symptom
code 233523 or 233472.
Technical Background
The new 6th generation ultrasound parking aid sensors are fitted for the first time at the introduction of the 2019
A8 (type 4N).
Within the limits of this new system, there is the ability to detect problems due to external influence such as dirt,
ice, and external ultrasound signals.
When the system detects such problems the system is made temporarily unavailable in order to prevent false
warnings to the driver. When this occurs a message is displayed to the driver in the instrument cluster.
Below are examples based on the symptom code found with DTC B107BF0 or B10FCF0:
• Symptom 233479/233523: Temporary partial availability of the system because of environmental influences
(e.g. external ultrasound signal, street sweeper, construction equipment, etc.).
• Symptom 233473/233472: Temporary partial availability of the system because of environmental influences
(e.g. dirt/ice).
Production Solution
Not Applicable
Service
Perform the following checks on the respective ultrasound sensors (depending on DTC):
• Check for dirt, ice, foreign objects, stickers, and a properly fit license plate.
• Check for damage on the bumper, air intake grille, and underbody which indicates an impact during parking.
• Check for mechanical damage (stone chips and scratches).
• Check the fit of the sensors, bumpers, and trim in the surrounding areas.
• Check the measured value block "Vibration time of parking aid sender" in the control module for driver assist
systems, J1121 (address word 00A5) for a cyclic/dynamic change of the respective measured values when
approaching an obstacle.
Page 2 of 3
© 2023 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.
Technical Service Bulletin
Scenario 1:
If the concern occurs sporadically: No further measures are necessary, as it is caused by
environmental influences.
Note:
In this case, replacement of the driver assistance systems J1121 without clear findings is not
effective. Part replacement of the J1121 does not solve this issue. Claims for replaced parts will
be subject to review.
Scenario 2:
If the concern is reproduced or is static: One of the ultrasound sensors, mountings or circuits
may be faulty. If this is the case, proceed with standard diagnosis.
Note:
An indicator a malfunction may be present is a significantly increased frequency counter within
the standard ambient conditions of the respective fault code.
Warranty
This TSB is informational only and not applicable to any Audi warranty.
Additional Information
All part and service references provided in this TSB (2058769) 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.
©2023 Audi of America, Inc. All rights reserved. The 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 3 of 3
© 2023 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.