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Technical Service Bulletin Transaction No.: 2079834/2
93 Electrical system: high-voltage battery - overview of charging complaints - A6/Q6 e- Release date: Dec 15, 2025
tron PPE
Condition

Model{s) Year(s) VIN Range Vehicle Specific Equipment

A6 Sportback e-tron, S6
Sportback e-tron (GH), Q6
e-tron, Q6 Sportback e-tron, 2025 All Not applicable
SQ6 e-tron, and SQ6
Sportback e-tron (GF)

REVISION HISTORY

Revision | Date Purpose
2 - Revised Condition (Corrected model table)
1 11/24/2025 | Initial publication

This TSB summarizes the known charging complaints relating to the specified vehicles and refers to the relevant
individual topics.

Customer states:
See below for general charging complaints
Workshop findings:

See below.

Technical Background

Software and hardware issues in high-voltage charger JX6 and/or in the control unit for activation of charging flap
and charging socket J1245/1246.

Production Solution
Not applicable.

Service

Using the following table and the customer complaint or workshop findings, try to establish a reference to the
respective topic and then perform the corresponding recommended repair.

Topic

No. | (based on customer complaint/workshop findings/event memory entry) Recommended repair

1. | Level 2 charging not possible (USA), AC charging process is cancelled, charging See TSB 2078719
socket lock does not lock

2. |“Charging cable connected’ is displayed in the instrument cluster, despite it not See TSB 2077962
being connected. Gear cannot be engaged, vehicle is classified as a breakdown

3. |AC charging only with limited charging power 7 kW or 3.x kW instead of 11 kW; AC | See TSB 2079832
charging only possible on one or two phases, car currently charging at the wall box
with max. 7.4 kW, although 11 kW would be possible.

4. |AC charging does not work, DC charging works See TSB 2079934

5. |High-voltage onboard supply warning lamp on: “AC charging restricted. Please Work through Guided
contact workshop” message displayed; vehicle interior does not heat up, Fault Finding
preconditioning not possible, event memory entry DA813B: B168AF4 — High-
voltage heater specified value not met - symptom: 11337731

If none of the topics listed above applies to this case, proceed using Guided Fault Finding. Ensure the vehicle has
the current combined software.

If you need additional technical repair support in this case, you must answer the following questions in advance:
1. Customer statement/precise customer complaint.
2. What exactly does not work: AC and/or DC charging?

3. More detailed description of fault: e.g. charging process aborts after xx seconds/does not start/etc.; photo
documentation of warning messages

4. Does the complaint always occur at the same charging station?

5. Can the complaint be reproduced?

6. Does the complaint only occur at one charging socket? If so, which one (right or left)?
7. What was the result of working through Guided Fault Finding?

8. What repairs have already been performed relating to the complaint?

Warranty

Claim Type: * — If the vehicle is outside of any warranty, this Technical Service Bulletin is informational
only.

Service Number: 9352

Damage Code: 0040

Claim Comment: As per TSB 2079834/2

Additional Information

All part and service references provided in this TSB (2079834) 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.

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