Technical Service Bulletin
97 MIL on: DTC U064100 or U064000 for fuel tank breather - 2.0 ltr. TFSI EA888
97 24 05 2069123/2 January 18, 2024. Supersedes Technical Service Bulletin Group 97 number 23-90 dated
January 17, 2023 for reasons listed below.
Model(s)

Year

VIN Range

Vehicle-Specific Equipment

All

Not Applicable

A4, A4 allroad,
A5, A5 Cabriolet,
2021 – 2023
and A5
Sportback

Condition
REVISION HISTORY
Revision

Date

Purpose

2

-

Revised header (Add Model Year 23)
Revised Production solution (Add description of specific change)

1

1/17/2023

Initial publication

Customer states:
The check engine warning lamp comes on.
Workshop findings:
One or more of the following DTCs are stored sporadically in the Engine Control Module, -J623- (address
word 01):
• DTC U064000: Lost Communication with EVAP Fuel Vapor Temperature Sensor Circuit.
• DTC U064100: Lost Communication with EVAP System Pressure Sensor/Switch Circuit "A”.

Technical Background
In certain circumstances, EMI may negatively influence the signal from the fuel tank breather system.

Production Solution
Optimized routing.

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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
Service
For DTC’s that are statically stored, continue with normal diagnosis, in this case the TSB does not apply.

Replacing the tank pressure sender will not fix the problem.
For DTC’s that are stored sporadically, the wire harness will need to be modified using the steps below.
1. Remove plenum chamber covers (green
arrows, Figure 1)
Release wiring harness securing clips
(yellow arrows, Figure 1).
Using a seam ripper, expose the wiring
harness as shown in Figure 2.

Figure 1: Plenum chamber covers (green arrows).

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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
2. Isolate the yellow/grey wire (triple
twisted wire; blue arrow, figure 2) in the
left bundle.
Isolate the yellow/purple wire in the
right bundle (black arrow, Figure 2).
Cut the yellow/grey wire at the blue
arrow and unravel it in the direction of
the plenum chamber up to the red
arrow.
Cut the yellow/purple wire at the black
arrow.

Figure 2: Wires isolated for modification.

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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
3. Using wire harness repair set VAS 1978
B, perform the following:
Connect the untwisted yellow/grey wire
(plenum chamber side) from the left
bundle to the yellow/purple wire in the
right bundle (engine side).
Connect the remaining yellow/purple
wire (plenum side) to the yellow/grey
wire (engine side).

Figure 3: wire modification complete.
4. Clear DTCs and recheck functionality. If ok, wrap the wiring harness in adhesive tape N 10729002 and
reassemble the vehicle.

Warranty
Claim Type:

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

Service Number:

9709

Damage Code:

0040

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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
Labor Operations:

Remove and install plenum chamber cover

8522 1900

See SRT with
associated
operations

Repair wiring harness

9709 4152

See SRT with
associated
operations

Diagnostic Time:

Modify wiring harness

9709 4999

10 TU

GFF

0150 0000

Time stated on
the diagnostic
protocol
(Max 100 TU)

Claim Comment:

Road test prior to the service procedure

No allowance

0 TU

Road test after the service procedure

0121 0004

10 TU

As per TSB 2069123/2

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.

Required Parts and Tools
Always check with your Parts Department and/or ETKA for the latest information and parts bulletins.
Part

Part Description

Quantity

Fasteners, Bolts, Nuts, and Screws as needed per the Repair

See

Manual

ETKA/ELSA

000979940

Butt connector

2

N 10729002

Adhesive Tape

.2

Number
See ETKA

Additional Information
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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
All parts and service references provided in this TSB (2069123) are subject to change and/or removal.
©2024 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.

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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.