Technical Service Bulletin
91 Adaptive Cruise Assist is not available, DTCs C12EBF1, C12EB92 is stored in the laserscanner
91 22 13 2053776/8 July 28, 2022. Supersedes Technical Service Bulletin Group 91 number 20-54 dated December
18, 2020, for reasons listed below.

Model(s)

Year

A8

2019 – 2024

A6, S6, A7, S7,
and Q8

VIN Range

Vehicle-Specific Equipment

All

Adaptive Cruise Control

2019 – 2020

e-tron quattro

2019

S8

2020 – 2024

A8 e quattro

2020 – 2021

e-tron Sportback
quattro, SQ8, and

2020

RS Q8

Condition
REVISION HISTORY
Revision

Date

Purpose

8

-

Revised header (Added MY22/23/24)
Revised Technical Background (Added DTC description)
Revised Service (Updated procedure for SW0306)

Page 1 of 6
© 2022 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
Revised Warranty (updated labor ops according to updated service
procedure)
7

12/18/2020

Revised header (Added MY21 and expanded applicable vehicles)
Revised Service (Updated SVM code)

6

06/19/2020

Revised Warranty (Updated Labor Operation)

Customer states:
• The adaptive driving assistance is not available or cannot be activated.
Workshop findings:
One of the following DTCs may be stored in the control module for laser scanner, J1122 (address word 00CD):
• DTC C12EBF1 (laser for adaptive cruise control, malfunction) with symptom code 11546627.
Or
• DTC C12EB92 (laser for adaptive cruise control, malfunction) with symptom code 11546631 and/or 11546632.

Technical Background
A software malfunction may cause certain DTCs to enter erroneously

Event memory entry/symptom

Conditions

Fault message in the
instrument cluster?

C12EBF1 / 11546627

Diagnosis detected discrepancies

Laser for adaptive cruise control Malfunction

in cover on laser scanner

NO

Page 2 of 6
© 2022 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
C12EB92 / 11546631

Diagnosis detected that cover on

Laser for adaptive cruise control Malfunction

laser scanner is missing

C12EB92 / 11546632

Event memory entry C12EB92 /

Laser for adaptive cruise control Malfunction

11546631 logged three times

YES

YES

Production Solution
Not Applicable.

Service
If the software version is lower than SW 0306:
SVM Update Instructions:
1. Follow all instructions in TSB 2011732: 00 Software Version Management (SVM), operating instructions.
2. Update the control module for lasers canner, J1122 (address word 00CD) using the SVM action code as listed in
the table below, if necessary:

Model

Old Software

Old Software

New Software Part New Software

Part Number

Version

Number

SVM Code Input

Version
(or higher)

A6, A7, A8,

4K8907660B

0200

Q8, and Audi

4K8907660C

0201

e-tron quattro

4K8907660D

0202

4K8907660E

0306

CDA003

Page 3 of 6
© 2022 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
0304
Tip: After the update, a bus sleep has to be awaited before clearing DTCs.
If the software version is exactly SW 0306:
Please check the table below for the service procedure according to the DTCs stored:

Event memory

Conditions

entry/symptom

Fault message Measure
in the
instrument
cluster

C12EBF1 / 11546627

Diagnosis

NO (from

Check laser scanner for damage and dirt.

Laser for adaptive cruise

detected

SW0205

If no issues are found, further measures are

control Malfunction

discrepancies in

onwards)

generally not necessary.

cover on laser

Note:

scanner

If the software version of the control unit for
laser distance control J1122 is SW0205 or newer,
event memory entry “C12EBF1: laser for
adaptive cruise control Malfunction” with
symptom no. 11546627 may still be logged
statically. Because of a changed reaction class,
this event memory entry has no impact on the
function of the adaptive cruise assist and can
be ignored.

C12EB92 / 11546631

Diagnosis

YES

Check laser scanner for damage and dirt.

detected that

Page 4 of 6
© 2022 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
Laser for adaptive cruise

cover on laser

If no issues are found, please work through the

control Malfunction

scanner is missing

test plan stored for these event memory entries
in ODIS. The event memory entry is erased
when you complete the test plan; further
measures are generally not necessary.

C12EB92 / 11546632

Event memory

YES

Check laser scanner for damage and dirt.

Laser for adaptive cruise

entry C12EB92 /

If no issues are found, please work through the

control Malfunction

11546631 logged

test plan stored for these event memory entries

three times

in ODIS. The event memory entry is erased
when you complete the test plan; further
measures are generally not necessary.

Warranty
Claim Type:

• 110 up to 48 Months/50,000 Miles.
• G10 for CPO Covered Vehicles – Verify Owner.
• If vehicle is outside any warranty, this Technical Service Bulletin is informational only.

Service Number:

9159

Damage Code:

0039

Labor Operations:

Software Update

0151 0000

Time stated on
the diagnostic
protocol (Max
100 TU)

Page 5 of 6
© 2022 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

Diagnostic Time:

Claim Comment:

Check laser scanner control unit

9159 0199

10 TU

GFF

No allowance

0 TU

Road test prior to service procedure

No allowance

0 TU

Road test after service procedure

No allowance

0 TU

As per TSB 2053776/8

All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures

Manual. Claims are subject to review or audit by Audi Warranty.

Additional Information
The following Technical Service Bulletin will be necessary to complete this procedure:
• TSB 2011732, 00 Software Version Management (SVM), operating instructions.
All part and service references provided in this TSB (2053776) 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.
©2022 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 6 of 6
© 2022 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.