2024-2025 Audi Q5 e Battery Charger Software Update

Audi has released Service Action 93SG to address a software-related concern affecting 2024-2025 Audi Q5 e models. This action focuses on updating the high-voltage (HV) battery charger software to resolve specific charging and warning message issues. The revision to this service action, dated December 18, 2024, provides updated claiming instructions and detailed fault clearing procedures for technicians.

The core purpose of Service Action 93SG is to ensure proper functionality of the vehicle's charging system and prevent misleading warnings. Owners of affected vehicles may experience an erroneous warning message in their instrument cluster, indicating a problem that does not actually exist. Furthermore, the issue can prevent the vehicle from fully charging to 100% when using a 110V charging cable.

Symptoms

Owners of affected 2024-2025 Audi Q5 e vehicles may observe an "erroneous warning message" displayed in the instrument cluster. This message can be misleading, suggesting a fault with the high-voltage system when none is present. Additionally, a more tangible symptom is the inability to achieve a full 100% charge when utilizing a standard 110V charging cable, despite the vehicle being connected for an adequate duration.

Fault Codes / DTCs

The underlying cause of these symptoms is typically accompanied by a specific diagnostic trouble code (DTC). The fault code B200000 is stored in the control unit responsible for high-voltage battery charging. This code indicates a perceived issue within the charging system, even if the hardware is functioning correctly.

Diagnosis / Trigger Conditions

The root cause of the erroneous warning message and charging limitation is attributed to overly sensitive diagnostic software within the high-voltage battery charging control unit. This software can misinterpret normal operating conditions or minor fluctuations as faults, triggering the B200000 fault code and the associated warning and charging restriction. The diagnostic sensitivity leads to incorrect reporting and functionality.

Repair Procedure Summary

The resolution for this issue involves performing a software update on the high-voltage battery charging control unit. This update, part of Service Action 93SG, recalibrates the diagnostic parameters, making them less prone to false positives. The revised software ensures accurate fault detection and allows for proper 110V charging up to 100% capacity. Technicians will follow updated claiming instructions and fault clearing procedures, including those detailed in Appendix A for the B200000 fault.

Important Warnings

Audi has emphasized the importance of using the most current information for this service action. Dealer personnel are instructed to thoroughly review the revised circular, which has been published to ELSA and Service References in Elsa2Go. It is crucial to discard any previously printed paper copies of the instructions and replace them with the most current version, identified by the revision number 93SG_REV20241218. This ensures that all repairs and claiming procedures for the Audi Q5 e battery charger software update are performed according to the latest guidelines.

Owner Action

If you own a 2024 or 2025 Audi Q5 e and have experienced an erroneous warning message in your instrument cluster or issues with 110V charging not reaching 100%, you should contact your authorized Audi dealer. They will be able to confirm if your vehicle is affected by Service Action 93SG and perform the necessary high-voltage battery charger software update. This repair is typically covered under warranty as a service action.

NHTSA ID: 11012551