2024-2025 Audi Q5 e Gateway Software Update TSB 2079116/1

Audi has issued Technical Service Bulletin (TSB) 2079116/1, released on August 29, 2025, for 2024-2025 Audi Q5 e Plug-in Hybrid Electric Vehicles (PHEV) in the United States market. This TSB describes a software update for the gateway, which is critical for proper vehicle diagnosis and communication within the electrical system. The Audi Q5 e gateway software update aims to resolve issues that can interfere with diagnostic procedures and data transfer.

Symptoms and Diagnostic Findings

Owners may not directly notice symptoms, as this issue is often discovered during routine maintenance or other service work. However, technicians may observe several diagnostic problems related to the "vehicle service -> vehicle diagnosis -> Guided Fault Finding (GFF)". Specifically, issues arise when reading the CAL ID/CVN (Calibration Identification/Calibration Verification Number) of the hybrid battery. Communication between the scan tool and the vehicle's gateway may be interrupted during the PVE(J)(1) test, potentially resulting in the CAL ID/CVN not being provided.

The workshop codes associated with these complaints point to issues within the power and vehicle electrical system's data transfer, specifically concerning the databus systems and the on-board diagnostic interface (OBD). Complaint types include "control modules, services -> software version incorrect", "control modules, services -> software faulty", "control modules, services -> communication malfunction", and "control modules, services -> communication interrupted". These indicate underlying software and communication problems affecting the data bus OBD interface and diagnostic connector.

Technical Background

The root cause of these issues is identified as a software problem within the diagnostic interface control unit, known as DA0019 or J533. Analyses of Q5 PHEV production vehicles have shown that the OBD PVE tests sometimes fail. This occurs because the high-voltage battery's response cannot be properly evaluated due to an incorrect sequence of messages. The gateway interchanges responses when segmented messages are sent for the CAL ID of the high-voltage battery (BECM), even though other responses are routed correctly. This software anomaly necessitates an Audi Q5 e gateway software update.

Repair Procedure Summary

The repair involves a critical software update for the Data Bus OBD Interface (J533) using the Service and Maintenance (SVM) system via the ODIS tester. This Audi Q5 e gateway software update ensures correct communication and diagnostic functionality.

Pre-Update Preparations: Before initiating the software update, it is absolutely crucial to unplug the high-voltage charging cable from the vehicle. This step must be performed before the SVM code is entered. This precaution is vital to prevent the high-voltage battery from charging during the software update, as charging during this process can cause significant damage to the high-voltage components.

Software Version Check: Technicians must first check the current software version of the control unit for information electronics J533 (diagnostic address 0019). If the existing software version is 0042, 0043, or 3093, the technical service bulletin procedure should be followed to update the software.

Update Process: The update is performed by flashing the data bus diagnostic interface J533 via SVM. To enter the necessary SVM code, technicians must use "Flash" mode on the ODIS tester. The specific functions to be used are "SVM - Authorized Multiple Code Entry" or "SVM – Multiple authorised code inputs". The new test program required for these software updates is already integrated into the ODIS software. During the update process, the vehicle will use acoustic signals and flashing lights to indicate when user input is required, both during and at the conclusion of the test program.

Post-Update Steps: Once the software update has been successfully completed, it is essential to unplug both the diagnostic connector and the charger from the vehicle. Next, the engine/motor should be started and allowed to run for a few minutes. After this, the vehicle must be locked, and technicians should wait for five minutes. Finally, the diagnostic procedure can be completed via ODIS to delete any event memory entries that were created during the flashing process.

Important Warnings

CAUTION: When entering the SVM code, it must be input exactly as written in the technical service bulletin, including any commas and without any spaces. Copying and pasting the code is strongly recommended to ensure accuracy and prevent errors.

Audi advises informing customers about this software update. It is important to note that if a customer or third party has previously modified the vehicle's software (e.g., through tuning or retrofitting), this update may neutralize those prior modifications. If a customer chooses to decline the software update, they should be clearly informed that this decision could lead to ongoing issues or restrictions with the use of the vehicle or individual components. This critical information should be noted on the repair order before it is signed by the customer and also recorded in the customer's file.

Warranty Information

For vehicles still covered under warranty, this software update will be performed free of charge. If the vehicle is outside of its warranty period, this Technical Service Bulletin is provided for informational purposes only, meaning the repair may not be covered. The Service Number for this procedure is 9035, and the Damage Code is 0039. The claim comment explicitly states "As per TSB 2079116/1". All warranty claims submitted for payment must strictly adhere to the Audi Warranty Policies and Procedures Manual, and claims are subject to review or audit by Audi Warranty.

NHTSA ID: 11022713