Technical Service Bulletin
93 "Electrical system: Malfunction! Safely turn off vehicle" is in the cluster, DTC P0AC000 is stored in
battery module
93 24 91 2059309/7 July 27, 2024. Supersedes Technical Service Bulletin Group 93 number 24-56 dated May 16,
2024 for reasons listed below.
Model(s)

Year

Q5 e quattro

2020 – 2021

A7 e quattro

2021

VIN Range

Vehicle-Specific Equipment

All

Not Applicable

Condition
REVISION HISTORY
Revision Date

Purpose

7

Revised Warranty (Updated labor time units)

-

Revised Condition (Updated Customer statements and workshop findings)
6

05/16/2024

Revised Warranty (Updated labor time units)

5

08/11/2023

Revised Warranty (Updated labor time units)

Customer states:
•

When the "ignition" is switched on, a red warning light appears, and the vehicle
cannot be moved.

•

The vehicle does not start.

•
•

In the instrument cluster, the red battery symbol (Figure 1) with the text "Electrical Figure 1. Red battery
symbol.
system: Malfunction! Safely turn off vehicle" is shown.
After turning the car off and then on again, the warning light usually goes out and
the vehicle works properly again.

Workshop findings:
•

According to Guided Fault Finding, the BJB (Battery Junction Box – SX6) should be replaced but the
replacement is not effective.

The following DTC is stored in the hybrid battery management module, J840 (address word 008C):
•

P0AC000 (Hybrid/EV Battery Pack Current Sensor "A" Circuit Range/Performance).

Other event memory entries may also be logged in address 008C:
•

P0AC000 in combination with P33F000.

© 2024 Audi of America, Inc.
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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
•

P0AC000 in combination with U059B00.

Technical Background
The internal communication between the BJB (Battery Junction Box – SX6) electronics and the current/voltage
sensor is under extremely unusual conditions and registers as inaccurate.

Production Solution
Improved software.

Service
The TSB applies if in the battery regulation control module, J840 (address word 008C) one of the following DTC
combinations is logged:
DTC

Combination/Not

Other DTC

Instructions

P0AC000

As the only entry in 008C

N/A

Perform TSB

P0AC000

In combination with

P33F000

Perform TSB

P0AC000

In combination with

U059B00

Perform TSB

The TSB does not apply if other DTCs in addition to the DTC combinations above are logged in the battery
regulation control module, J840 (address word 008C). If this is the case, standard diagnosis continues outside of
this TSB.

Tip: To prevent the high-voltage battery from charging during the software update, the high-voltage
charging cable on vehicles with high-voltage components must be unplugged BEFORE the SVM code is
entered. Please note that charging the high-voltage battery during a software update can cause damage
to the high-voltage components.

Tip: To ensure the flashing procedure does not fail, please ensure the diagnostic scan tool has been
updated to the latest level

© 2024 Audi of America, Inc.
Internal

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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
Tip: As the Battery Junction Box (SX6) is a slave of the hybrid battery management module, J840
(address word 008C) it does not display the software version of the control modules directly in the
diagnostic log, instructions on how to evaluate the various software versions are provided below.

Identifying the control modules:
1 To obtain the data we need to use the diagnostic scan tool then right-click and select the hybrid battery
. management module, J840 (address word 008C), and select “Guided Functions” (Figure 2).

Figure 2. Guided Functions.

© 2024 Audi of America, Inc.
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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
2 In the Guided Functions menu select
. 008C – Identification and click
“Perform” (Figure 3).

Figure 3. Guided Functions Menu.
3 The Identification data of the hybrid battery management module, J840 (address word 008C) is now
. displayed (Figure 4). Write down the Software part number, Software Version number, Hardware part
number, and Hardware version number, as this information will be needed in the following steps. After you
have saved the data for later, answer yes to the question “Do you still want additional identification data?”

ure 4. Identification data, Hybrid Battery Management module.

© 2024 Audi of America, Inc.
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Fig

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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
4 After selecting “Yes” the scan tool will obtain more data from the hybrid battery management module, J840
. (address word 008C). This data is not needed for this TSB so we can ignore it and click “Continue”.
5 The next screen will ask “Do you want to read and display the subsystems” and it will display the number of
. slave control modules. Select “Yes”.
6 After selecting “Yes” the scan tool will obtain the identification of all the slave modules of the hybrid battery
. management module, J840 (address word 008C). The Battery Junction Box (SX6) should be the 1st Slave
displayed but if it is not scroll down until you find it and write down the Software part number, Software
Version number, Hardware part number, and Hardware version number, as this information will be needed in
the following step.

Figure 5. Battery Junction Box (SX6) Identification.
7 Now compare your actual software and hardware with the table below and if the vehicle has the affected
.
software in either the hybrid battery management module, J840 (address word 008C) or the Battery
Junction Box (SX6) then update the control modules according to the SVM instructions below.
If both control modules already have the improved software this TSB does not apply.

Affected Software
Control
Module

Software part
number

Software
Level

Hardware part
number

Software part
number

Software
Level

Hardware part
number

4K0915233

0275

4KD915233

4K0915233A

0278

4K0915233

4M0915233R

0274

4M0915233C

4M0915233AE

0278

4M0915233C

SX6

4K0915254C

0205

4K0915254C

4K0915254D

0206

4K0915254C

(06D0)

80A915253C

0103

80A915253C

80A915253E

0106

80A915253C

008C

© 2024 Audi of America, Inc.
Internal

Improved Software