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Technical Service Bulletin

91 Charging target cannot be adjusted in MMI

Transaction No.: 2077780/3
Release date: Dec 12, 2025

Condition
Model(s) Year(s) VIN Range Vehicle Specific Equipment
Q4 e-tron, and Q4 :
Sportback e-tron 2022 — 2026 All Not applicable
REVISION HISTORY
Revision |Date Purpose
3 - Revised Condition (Added model table)
Revised Service (Updated customer statement error code)
2 06/02/2025 | Revised header (Updated workshop codes)
Revised Warranty (Updated labor operations)
1 04/28/2025 | Initial publication
Customer statement:

* The customer complains that the charging target setting cannot be adjusted (Figure 1).

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Figure 1. Charge target setting in the MMI.

In the context of the issue that the charging target cannot be set, an error message appears in the myAudi app
(Figure 2) indicating that the set charging target cannot be sent.

With one of the following fault codes:

iOS fault code:

Error: R:27164-E:BFF.4103
Error: R:F412T-E:BFF.4105

Android fault code:

Error: R.F412T-E:EX.2

Could not send the
desired target
charge

An unknown error has occurred

Error: R:F412T-E:BFF.4105
(250225175625)

Try again

Close

Figure 2. Screenshot from app: “The desired charging target could not be sent. An unknown error has occurred.”

The charging timers also cannot be set in the app or on the MMI.

Workshop findings:
The customer complaint can be reproduced; the charging target is set at 84% and cannot be adjusted.

The adjustment options with a plus symbol / minus symbol / red dot are not displayed.
«* An error message appears in the myAudi app indicating that the charging target cannot be sent.

* The charging timers cannot be set in the app or on the MMI.

Technical Background

Software issue in diagnostic interface control unit (DA0019).

Production Solution

Not applicable.

Service

This bulletin replaces Pending Service Solution (PSS) 2076055: 91 PSS MIB3: Charging target cannot be adjusted
in the MMI.

Important information:

For MY26 Q@4 models, the measure described below is not possible and the repair must therefore be
postponed. We will continue to keep you informed about new findings in relation to TSB 2079656, 97 PSS Audi
Connect: Charging Targets cannot be adjusted.

Applies to vehicles with high-voltage components:

fy caution

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.

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Please note that charging the high-voltage battery during a software update can cause damage to the
high-voltage components.

Note:

The software for the diagnostic interface must be updated on this vehicle. Please observe the information and
instructions under “Customer information’.

Please check the following first:

If the diagnostic interface (diagnostic address 0019) has a software part number with 1EA**** and a software
version