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Technical Service Bulletin

44 Tire pressure/loose wheel warning shown

Condition

Transaction No.: 2077226/6
Release date: Dec 18, 2025

Model(s)

Year(s)

VIN Range

Vehicle Specific Equipment

Ad, S5 (FU), Q5, Q5
Sportback, SQ5, and SQ5_ | 2025-2026
Sportback (GU)

A6 Sportback e-tron, S6
Sportback e-tron (GH), Q6 e-
tron, Q6 Sportback e-tron, 2025
SQ6 e-tron, and SQ6
Sportback e-tron (GF)

All

Not applicable

REVISION HISTORY

Revision | Date Purpose

6 - Revised header (Added Model Year)
Revised Condition (Updated model table)
Revised Service (Updated verbiage)
Revised Warranty (Updated Labor Operations)

5 11/24/2025 | Revised Condition (Added model table)
Revised Warranty (Updated table)

4 10/17/2025 | Revised header (Updated Model Year)
Revised Service (Updated Information)
Revised Warranty (Updated table)

Customer states:

The loose wheel or tire pressure warning is active. It may appear in combination with other messages.

Workshop findings:

The complaint can be reproduced. Various DTCs may be logged in the vehicle.

Technical Background

Not applicable.

Production Solution

Not applicable.

Service

Please perform the software update described in TSB 2079690, 00 Combined software update 03.10.00/C
(28.13.01) KD2.

If TSB 2079690 is not available or if the complaint persists after the update, you can use the following information to
help narrow down the cause of a complaint about the loose wheel warning or tire pressure. It is not always
necessary to perform all of the steps, but the following points can be helpful when processing the complaint (This
TSB number cannot be used for billing labor time):

Update the vehicle to the latest software version (perform campaigns or other TSBs).
Check addresses 812C and 0003, and 0065 (if available) for relevant DTCs.

lf DTCs have been logged for individual wheels or all four wheels, performing wheel balancing or swapping
wheels over may help.

Check that the speed sensors and sensor rings for the affected wheel are clean and working correctly.

If there are problems with the availability of the system, the issues in the vehicle should be corrected
according to Guided Fault Finding.

Always make sure that addresses 812C and 0003 are functioning correctly.

Check DTCs in other control units and specific further TSB available (2078345) which are possible causes of
issues with the loose wheel warning in terms of the chain of effects or based on a message in the instrument
cluster.

Loose wheel warning and tire pressure messages are often a result of other issues with the vehicle, therefore
the main cause should be rectified first.

Warranty
Claim Type: * — If the vehicle is outside of any warranty, this Technical Service Bulletin is
informational only.
Service Number: 4545
Damage Code: KD02
Labor Operations: Software update, including connecting battery [01510010 See SRT with
charger associated
operations
Fixed rate for software update, including all 0151 0040 130 TU
required preliminary and follow-up work
(including bus sleep cycle, calibration drives,
and additional work)
In the case of additional attempts after flash 0150 9999 50 TU
abort occurred, an additional lump sum of 50
time units can be claimed per flash cancellation Per each
documented attempt
Claim Comment: As per TSB 2077226/5

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.

When performing the combined software update, time stamps are not required for billing under warranty. You are
therefore permitted to work on other vehicles at the same time. The combined software update can also be
performed by non-productive personnel.

Additional Information

All part and service references provided in this TSB (2077226) 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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