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Technical Service Bulletin

01 MIL on, DTC PO64F00 Stored in ECM

Condition

Transaction No.: 2078914/4
Release date: Dec 18, 2025

Model(s)

Year(s)

VIN Range

Vehicle Specific Equipment

A5, S5 (FU), SQ5, and
SQ5 Sportback (GU)

2025

All

Not applicable

REVISION HISTORY

Revision | Date

Purpose

4

Revised header (Added Model Year)

12/08/2025

Revised header (Added model, updated control units)
Revised Condition (Added model table)

Revised Service (Updated verbiage)

2

10/15/2025

Revised header (Added Model)

Customer states:

Issue only occurs when performing diagnostic work in the workshop.

Engine does not start

MIL/ Exhaust emission warning lamp is on.

Workshop findings:

The following DTC is stored in the ECM, J623(address word 0001):

Unauthorized software/coding detected PO64F00 active (Refer to example V6 TFSI no coding)

Data source:

Hardware part number:
Part number:

Hardware version number:
Software version umber:

Production date:

Vehicle
O6M907309N
SB3907559B
Hao

0006
16.01.2025

Coding: 08 25 00 02 60 G2 0104600 60 00:00 00 0000 00 00.00 00 000000 00 00
Coding: =
§Coding: OOOTOOOOOOOOOO NDOO DDD O000COO0N0000000 0000000000 i

Ability to flash:

System name:

ASAM base version:

ASAM 2D/ODX data set:

ASAM 2D/ODX data set version:

Target data container:

Version of the target data container:

Equipment code:

System abbreviation:

DTC memory entry
Number:

Error type 2:
Symptom:

Status:

Technical Background

Unknown

V6 3.01 TFSI

BV EnginContrModullUDS
EV_ECM3071FS011863 9075598
001007

06M909102BK

0005

00 00 00:00 00 00 00.00

Jé23

POé4F00: Unauthorized Software/Calibration Detected
active/static

10529

10100111

The coding for the engine control unit may be lost during the ODIS diagnosis in the workshop. The precise cause is

currently being analyzed.

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.

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
occurred, an additional lump sum of 50 time units
can be claimed per flash cancellation

0150 9999

50 TU

Per each
documented
attempt

Claim Comment:

As per TSB 2078914/4

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 (2078914) 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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