2024 Audi Yellow Battery Warning Lamp TSB 2078806/1

Audi has issued Technical Service Bulletin (TSB) 2078806/1, released on August 1, 2025, to address a specific software-related issue affecting various 2024 Audi models, including the 2024 Audi Q8. This bulletin targets instances where drivers encounter a yellow battery warning lamp in the instrument cluster, often accompanied by a critical message indicating an electrical system malfunction.

The TSB, identified as 2078806/1, provides a comprehensive solution for this problem, which is rooted in the vehicle's gateway software. Owners experiencing a 2024 Audi Q8 yellow battery warning should be aware of this communication.

Symptoms

Owners of affected 2024 Audi vehicles may observe the following symptoms:

• A yellow warning lamp illuminated in the instrument cluster.
• A message displayed on the information screen stating: "Electrical system: malfunction! Please contact Service".
• The warning lamp may temporarily disappear after cycling the ignition off and then on, but it is likely to reappear.
• Other related symptoms can include issues with the battery charge level information display, generator control warning display, and exterior lighting malfunction indicator.

Fault Codes / DTCs

When diagnosing this issue, technicians may find the following Diagnostic Trouble Code (DTC) stored in the data bus diagnostic interface (J533, diagnostic address 0019, also referred to as DA00019):

Diagnostic Trouble Code	Description
P0A1F00	Battery Energy Control Module "A" Performance

Technical Background

The root cause of the 2024 Audi Q8 yellow battery warning and associated DTC P0A1F00 is a software issue within the diagnostic interface control unit (DA00019). This software anomaly leads to incorrect reporting of the battery management fault, triggering the warning lamp and messages. Audi has scheduled a production change to address this issue in new vehicles starting in Q3/2025.

Important Warnings for High-Voltage Vehicles

For vehicles equipped with high-voltage components, specific precautions must be taken during the software update procedure to prevent damage:

• High-voltage charging cable must be unplugged BEFORE the SVM code is entered to prevent the high-voltage battery from charging during the software update.
• Charging the high-voltage battery during a software update can cause damage to the high-voltage components.

Repair Procedure Summary

To resolve the 2024 Audi Q8 yellow battery warning and DTC P0A1F00, a software update must be performed on the data bus diagnostic interface J533 (DA00019) via the Audi SVM (Software Version Management) system. This TSB 2078806/1 supersedes previous bulletin PSS 2076606.

1. Access ODIS Tester: Connect the ODIS tester and use the "Flash" mode.
2. Select Function: Utilize the "SVM - Authorized Multiple Code Entry" or "SVM – Multiple authorised code inputs" function.
3. Enter SVM Code: Input the specific SVM code exactly as written: ZGDOIP,19A027,19B027. Copying and pasting is recommended to avoid errors.
4. Follow ODIS Instructions: Adhere to all instructions provided by the ODIS tester. The vehicle will use acoustic signals and flashing lights to indicate when user input is required.
5. Post-Update Steps: After the software update is complete, it is crucial to unplug both the diagnostic connector and any charger from the vehicle.
6. Vehicle Cycle: Start the engine and let it run for a few minutes. Then, lock the vehicle and wait for five minutes.
7. Clear Event Memory: Once these steps are completed, finish the diagnostic procedure via ODIS to delete any event memory entries created during the flashing process.

Control Unit Details

The software update targets the 0019 - Data Bus OBD Interface (DA00019). The required software version after the update is SW 0052. Prior to the update, various software part numbers may be present, including 3039, 0043, 0025, 0027, 0051, and 0042, all typically associated with Hardware version H06.

Warranty Information

This Technical Service Bulletin is informational only if the vehicle is outside of its warranty period. For in-warranty repairs, claims must be submitted in accordance with the Audi Warranty Policies and Procedures Manual. The service number for this procedure is 9035, with a damage code of 0039. Labor operations include 0151 0010 (Software update), 0151 0060 (Software update), and 0689 0199 (Check vehicle, bus sleep mode), which accounts for 10 labor units.

Owner Action

If you own a 2024 Audi model and are experiencing a yellow battery warning lamp or the message "Electrical system: malfunction! Please contact Service," it is recommended to contact your authorized Audi dealer. They can perform the necessary software update outlined in TSB 2078806/1. Be aware that this software update may neutralize any previous modifications to the vehicle's software by the customer or third parties. Declining the software update could lead to ongoing issues or restrictions with vehicle functionality.

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Source: NHTSA ID: 11022649