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Technical Service Bulletin Transaction No.: 2081073/1
90 PPE/PPC: warning messages about assist systems - U171200 Release date: Feb 19, 2026
Condition

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

Ad, $5 (FU), Q5, Q5 Sportback,
SQ5, SQ5 Sportback (FU), A6
Sportback e-tron, S6 Sportback e- 2025
tron, Q6 e-tron, Q6 Sportback e- All Not licabl
tron, SQ6 e-tron, and SQ6 ot applicable

Sportback e-tron

AG (FN) 2026

This TSB replaces PSS 2079757, 90 PSS PPE/PPC: warning messages about assist systems — U171200

Customer States:

The customer complains that fault messages relating to the driver assist systems appear together with the take over
steering prompt only shortly after starting the vehicle.

Figure 1. Take over steering warning light.

Depending on the equipment fitted, all driver assist systems are affected, such as:
* Adaptive cruise assist: fault. You can continue driving

« Lane departure warning: fault. You can continue driving

* Active front assist / distance warning: fault. You can continue driving

* — Traffic sign recognition: fault. You can continue driving

¢ Adaptive light: fault

* Main beam assist: fault

« Lane change assist: currently unavailable

* Proactive occupant protection: currently unavailable

* Driver assist systems currently restricted
* Emergency Assist: fault. You can continue driving (in combination with the red take over steering prompt (see
Figure 1).

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If the red warning lamp for the take over steering prompt is not active, this TSB does NOT apply.

©

If only some of the fault messages listed above have occurred or are active, this TSB does NOT apply.
The TSB is also NOT applicable if notifications are displayed stating various driver assist systems are not
available due to restricted visibility.

Workshop Findings:
The customer concern can be reproduced in the workshop:

The concern can be reproduced based on the active messages in the instrument cluster. The warnings in the
instrument cluster are active.

For the complaint described here to apply, warning messages must be active and diagnosis via ODIS for the
diagnostic addresses 00A5 and 8103 must not be possible. The two diagnostic addresses 00A5 and 8103 cannot
be read out.

In addition to this, the DTC U171200 “Driver assistance main control module, no communication, active/static with
symptom 4540” is logged in the Data Bus On Board Diagnostic Interface, J1273 (diagnostic address 0019).

The complaint only applies if the following issues occur simultaneously
* If there are active warnings.

and
* — If diagnostic addresses 00A5 and 8103 cannot be accessed.
and

* — If the specified event memory entry is logged.

The complaint is temporarily remedied, e.g. by a terminal 30 reset of the "Diagnostic interface or data bus J1273" or
by a bus sleep cycle. Bus sleep mode starts approx. 3 minutes after switching the ignition off and locking the
vehicle.

The customer complaint cannot be reproduced in the workshop:

The only indication that the complaint applies to this TSB is the DTC U171200 “Driver assistance main control
module, no communication, passive/intermittent with symptom 4540” in diagnostic address 0019 and corresponding
documentation (photo, video) by the customer.

Using the ambient conditions, date and time and the frequency counter, check that the event memory matches the
time of the customer complaint. If the symptoms described above apply in relation to the customer complaint, there
is an indication that the functional impairment described in this documentation applies.
[0]

Documentation required

Technical Background

The complaint relates to a software issue in the Data Bus Diagnostic Interface Control Unit, J1273 (diagnostic
address 0019) which occurs shortly after switching the ignition on. The complaint occurs for one driving cycle and
automatically fixes itself after a bus sleep cycle. A bus sleep cycle can be achieved switching off the ignition, locking
the vehicle and then waiting for approximately 3 minutes.

Production Solution
Week 36/2026

Service
Follow all instructions in TSB 2011732: 00 Software Version Management (SVM), operating instructions.
Run the SVM code as specified in the instructions below.

Prerequisites for flashing:
* The driver door must remain open for the duration of the flashing procedure.

* Before entering the code, check whether the current date/time is displayed in the vehicle. If not, move the
vehicle to a location where there is GPS reception, or set the date and time manually. Otherwise an update will
not be possible, or it will be aborted.

* No additional/other work may be performed on the vehicle for the entire duration of the update.

Please note the following before entering the SVM code:

Connect battery charger unit in accordance with specifications in “Standards for workshop equipment”.
Switch off electrical equipment (blower, seat heater, lights, etc.).

Move selector lever to position P.

Connect diagnostic tester to vehicle with USB cable and keep driver’s door open for duration of flashing
procedure.

We strongly recommend flashing using a USB cable. This ensures that data transmission is as reliable as
possible.

To use the SVM code, please proceed as follows:

Flashing Orders Special functions

Tests for the complete vehicle

Status "Checks

Software version management (SVM)

a SVM - Authorized Multiple Code Entry
- | SVM - Check vehicle configuration
= Erase fault memory - overall system
a SVM - Code input
= SVM - FoD activations - manual
SVM - special functions
2 SVM activations
- Send flash protocol

Figure 2: ODIS SVM Test Plan

1. Run the test program "SVM — Check vehicle configuration” in ODIS (Figure 2). This step is required to use
the SVM-code in step 2.

2. Select the “Flash” function, select “SVM code input” and enter the code EGDHCP5DA0019.

3. Flashing will be performed. Due to a system restriction, the procedure will end with the error 8113. Ignore this
error. If a different error code appears, proceed as specified in the error message.

4. Run the "SVM — Check vehicle configuration” test program in ODIS again.
5. Perform a sleep cycle, end the diagnostic session, and send the diagnostic log online.

Note: The SVM code is used for diagnostic address 0019; however, it does not result in any changes to the
identification data, such as the part number or software version.

Warranty
Claim Type: * If the vehicle is outside of any warranty, this Technical Service Bulletin is
informational only.
Service Number: 9035
Damage Code: 0039
Labor Operations: Software update 0151 0010 See SRT with
associated operations
Software update 0151 0060 Time stated on the
diagnostic protocol
Claim Comment: As per TSB 2081073/1

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.

Additional Information
The complaint relates to a software issue which occurs shortly after switching the ignition on. The complaint occurs
for one driving cycle and automatically fixes itself after a bus sleep cycle. A bus sleep cycle can be achieved
switching off the ignition, locking the vehicle and then waiting for approx. 3 minutes.

All part and service references provided in this TSB (2081073) 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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