Technical Service Bulletin
13 Starter/generator drive belt is noisy or came off, DTC P2BA300 may be stored in the ECM
13 23 17 2061461/7 March 17, 2023. Supersedes Technical Service Bulletin Group 13 number 23-16 dated
January 3, 2023, for reasons listed below.
Model(s)

Year

A6

2019 – 2023

VIN Range

Vehicle-Specific Equipment

All

Not Applicable

A4, A4 allroad,
A5, A5 Cabriolet,
A5 Sportback,
2021 – 2023
Q5, and Q5
Sportback

Condition
REVISION HISTORY
Revision

Date

Purpose

7

-

Revised header data

6

01/03/2023

Updated Service solution

5

10/28/2022

Revised Service solution

Customer states:
• There is a grinding/squeaking/tweeting noise coming from the engine compartment.
Or
• A message in the driver information system (DIS) displays "Electrical system: Malfunction! Please go to
workshop" (if the poly V-belt has fallen off).
Workshop findings:
• The grinding/squeaking/tweeting noise is coming from the poly V-belt (alternator belt).
Or
• The poly V-belt is damaged or has fallen off the wheel roller.
The following DTC may be stored in the engine control module (ECM), J623 (address word 0001):
•

DTC P2BA300 (Starter/Generator mechanical performance).

Technical Background
Page 1 of 5
© 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
Deviation on the rollers of the belt tensioner.

Production Solution
Improved belt tensioner in production

Service
Scenario 1: Grinding, squeaking, or tweeting noises
1. Let the engine run at idle speed and assess the noise.
An example of the noise can be found in the following video:
https://audiexternal.kzoplatform.com/player/medium/1823282939031459668
(Figure 1).

Figure 1. QR code for supporting video.
2. For final confirmation of the source of the noise, spray the inside of the poly V-belt with a little tap water. One
spray blast out of a commercially available water spray bottle is enough. The noise should disappear as a
result.
3. If the noise disappears after spraying with water, replace the poly V-belt and belt tensioner. If a new belt
tensioner has already been installed, do not replace it again.

Scenario 2: Poly V-belt damaged or fallen off
1. Replace the belt tensioner and poly V-belt. If a new belt tensioner has already been installed, do not
replace it again.
Check for correct belt running alignment after poly V-belt and tensioner replacement as follows:
1. Run the engine at idle speed.
2. The belt must not protrude forward or backward over the roller edge of the tensioner (Figure 2, red marks).

Page 2 of 5
© 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

Figure 2. Check to ensure that the poly V-belt is not protruding in either direction.
Explanation of Figure 2 (view from above into the engine compartment):
A = poly V-belt.
B = tensioning roller of the belt tensioner.
Note:
Please ensure that the belt tensioner (including the retaining tab) is not damaged during removal. Damage to
the component would make analyzing the parts impossible. In such cases, we may charge back the
damaged parts.
Example of damaged parts:

Page 3 of 5
© 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
Warranty
Claim Type:

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

Service Number:

1373

Damage Code:

• 0020 (Noisy belt).
• 0015 (Belt came off).

Labor Operations:

Diagnostic Time:

Ribbed belt remove + install

1372 1915

See SRT with
associated
operations

Belt tension damper remove + install

1373 1965

See SRT with
associated
operations

Check Poly V-Belt run alignment

1372 0199

10 TU

GFF – Checking and clearing fault codes

0150 0000

Time stated on
the diagnostic
protocol (Max 20
TU)

Road test prior to the service procedure

No allowance

0 TU

Road test after the service procedure

No allowance

0 TU

As per TSB 2061461/7
Claim Comment:
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 Number

Part Description

Quantity

See ETKA

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

See ETKA/ELSA

Page 4 of 5
© 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
See ETKA

Belt Tensioner

01

See ETKA

Poly-V Belt

01

Additional Information
All part and service references provided in this TSB (2061461) are subject to change and/or removal.
©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 5 of 5
© 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.