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Technical Service Bulletin Transaction No.: 2080076/2

97 Engine warning lamp on, DTC "P157000 Engine Control Module (ECM) locked" is
logged in the ECM

Release date: Dec 18, 2025

Condition
Model(s) Year(s) VIN Range Vehicle Specific Equipment
Software Version:
A5 Coupe, S5 Coupe (FU), 1436
Q5, Q5 Sportback, SQ5, and| 2025 — 2026 All
SQ5 Sportback (GU) 1437
1496

REVISION HISTORY

Revision Date Purpose

2 - Revised header (Add Model Year)

Revised Condition (Add description of specific change)

1 11/20/2025 | Initial publication

Customer states:

The customer statement depends on the type of engine:
Vehicles with 2.0 ltr. gasoline engine:

* The engine does not start at the first attempt.

* Several driver messages appear in the instrument cluster.

* — After switching the ignition off and on, the engine starts again and there are no further issues.

All other engines:
* Several driver messages appear in the instrument cluster after starting the vehicle.
* The vehicle can only be driven electrically; the engine does not start.

* — After switching the ignition off and on, the engine starts again and there are no further issues.

Workshop findings:
The customer complaint cannot usually be reproduced.

The following DTC is logged in the Engine Electronics -J623-, (address word: 0001):
* P157000: “Engine Control Module (ECM) locked.”
Technical Background
Software issue the in onboard supply control unit J519 (diagnostic address 0009).

Production Solution
Production change in @4 of 2025.

Service
This TSB only applies if:

1. The DTC "P157000 Engine Control Module (ECM) locked” is logged in the engine control module
(diagnostic address 00071).

2. The DTC "Transmission control module locked” is NOT logged in the transmission control module
(diagnostic address 0002).

Please perform the software update described in 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: 9710
Damage Code: KDO2
Labor Operations: Software update, including connecting |0151 0010 See SRT with
battery charger associated
operations
Fixed rate for software update, 0151 0040 130 TU
including all required preliminary and
follow-up work (including bus sleep
cycle, calibration drives, and additional
work)
In the case of additional attempts after | 0150 9999 50 TU
flash abort occurred, an additional lump
sum of 50 time units can be claimed al each 4
per flash cancellation ocumente
attempt
Claim Comment: As per TSB 2080076/2

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

All part and service references provided in this TSB (2080076) 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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