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Technical Service Bulletin

24 Engine: engine control unit - exhaust emissions warning lamp lights up - DTC

PO5SOA - 2.0 ltr. 4-cyl. TFSI

Transaction No.: 2079927/2

Release date: Dec 19, 2025

Condition
Model(s) Year(s) VIN Range Vehicle Specific Equipment
Ad, (FU), Q5, Q5 .
Sportback (GU) 2025 All 2.0 TFSI, 4 cylinder
REVISION HISTORY
Revision | Date Purpose

2 - Revised Warranty (Updated Labor Operations)
1 11/10/2025 | Initial publication
Customer states:

* The exhaust emissions warning lamp lights up.

Workshop findings:

* The event memory entry “PO50A00 - Idle speed control, malfunction at cold start” is logged in the engine

control unit.

Technical Background

Not applicable.

Production Solution

Updated software is available.

Service

This bulletin replaces PSS 2079008, 07 PSS Engine MIL on, DTC PO50A00 Idle Speed Control stored in ECM.
Please perform the software update described in TSB 2079690, 00 Combined software update 03.10.00/C

(28.13.01) KD2.

Warranty

Claim Type:

If the vehicle is outside of any warranty, this Technical Service Bulletin is

informational only.

Service Number:

2470

Damage Code: KDO2

Labor Operations: Software update, including connecting battery 0151 0010 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 abort }0150 9999 50 TU
occurred, an additional lump sum of 50 time units

can be claimed per flash cancellation Per each

documented attempt

Claim Comment: As per TSB 2079927/2

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

The software must be updated on a control module in this vehicle, or the software must be updated on several
control modules in this vehicle to ensure that they function correctly in conjunction with the other control modules in
the vehicle. Please inform the customer about the software update in question and ask whether they or other third
parties have modified the software (e.g. tuning or retrofitting involving modifications to the vehicle’s software).
Please inform the customer that this software update may neutralize previous modifications to the vehicle’s software
performed either by the customer or other third parties.

If the customer declines the software update, please inform them that this could lead to issues or restrictions with
the use of the vehicle or individual components.

Mak a note to this effect on the order before it is signed by the customer. Include this information in the customer
file.

All part and service references provided in this TSB (2079927) 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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