2022 Audi e-tron GT 12V Battery Software Update

Audi has issued Service Action 27K2, a dealer communication dated February 16, 2023, to address a specific software issue affecting the 12V battery control module in certain 2022 Audi e-tron GT vehicles. This critical service action aims to prevent a potential problem where the 12V battery could discharge completely in isolated cases, leading to various operational difficulties for the owner. The repair, which became available on February 17, 2023, involves a software update to rectify this condition.

Symptoms

Owners of affected 2022 Audi e-tron GT vehicles might experience symptoms related to a completely discharged 12V battery. This could include the vehicle failing to start, experiencing intermittent electrical system malfunctions, or encountering warning lights on the dashboard related to battery or electrical system issues. A discharged 12V battery can significantly impact vehicle usability and reliability, highlighting the importance of addressing the underlying software fault. This specific software anomaly in the 12V battery control module is the root cause of the unexpected battery drain.

Diagnosis and Trigger Conditions

The root cause of the 12V battery discharge in the 2022 Audi e-tron GT is identified as a software issue within the 12V battery control module. While the communication does not list specific diagnostic trouble codes (DTCs), a technician would typically identify a low or discharged 12V battery during routine service or in response to a customer complaint. The diagnosis would then point towards the need for the software update outlined in Service Action 27K2. The document notes that this issue occurs in "isolated cases," meaning not all vehicles will necessarily exhibit the symptom, but the potential for it exists due to the software defect.

Repair Procedure Summary

The repair procedure for Service Action 27K2 is straightforward: it involves updating the software for the 12V battery control module. This software update is designed to correct the programming flaw that can lead to the 12V battery discharging. Audi instructed its dealerships to refer to ELSA/ServiceNet for detailed, complete repair and claiming instructions. This ensures that technicians follow the precise steps required to successfully apply the software patch and resolve the potential battery discharge issue.

Parts Information

A key aspect of Service Action 27K2 is that no physical parts are required for this repair. The solution is entirely software-based, meaning technicians will only need to perform a software update on the existing 12V battery control module. This simplifies the repair process and reduces the need for parts inventory management for dealerships.

Important Warnings

Audi emphasized a critical instruction for its dealerships: "Repair every affected inventory vehicle before delivery to consumers." This directive ensures that any 2022 Audi e-tron GT vehicles currently in dealer stock that are subject to Service Action 27K2 must have the software update performed prior to being sold or delivered to a customer. This proactive measure is crucial for customer satisfaction and safety, preventing new owners from encountering the 12V battery discharge issue shortly after purchase.

Owner Action

If you own a 2022 Audi e-tron GT, it is highly recommended to contact your local authorized Audi dealership to inquire about Service Action 27K2 and schedule the necessary software update. Audi initiated an owner mailing campaign in February 2023 to inform affected vehicle owners directly about this service action. Dealerships have been instructed to schedule owner repairs immediately. To confirm if your specific vehicle is included in this campaign, your dealership can check the Campaigns/Actions screen in ELSA using your Vehicle Identification Number (VIN). This system is the only valid source for campaign inquiry and verification.

Source: NHTSA ID 10232108