2020-2025 Audi SOS Fault B200000 Warning TSB

Owners of various 2020-2025 Audi models, including the Audi e-tron, may encounter a dashboard warning indicating an issue with the emergency call system. This specific problem, identified by Technical Service Bulletin (TSB) 2059528/17, often presents as an "Emergency call function: malfunction! Function unavailable. Please contact service" message and is linked to Diagnostic Trouble Code (DTC) B200000. This TSB provides a detailed solution for this software-related fault.

Symptoms

Drivers will typically notice a prominent warning message appearing in their instrument cluster. The exact wording of this message is: "Emergency call function: malfunction! Function unavailable. Please contact service". This visual alert is often accompanied by a red LED indicator on the ConBox High module, signaling a problem with the emergency call (SOS) system. This issue affects the critical safety feature of emergency communication, though it is often a false alarm due to software.

Fault Codes / DTCs

When this issue occurs, the vehicle's diagnostic system will store a specific Diagnostic Trouble Code (DTC) in the Emergency Call Module and Communication Unit (ConBox), also known as J949 (address word 0075). The DTC associated with this fault is:

• B200000: Ctrl. Module Faulty (active / static).

This code indicates a perceived fault within the control module itself, even if the hardware is functioning correctly.

Technical Background

Audi has determined that the root cause of the "Emergency call function: malfunction! Function unavailable. Please contact service" warning and the associated DTC B200000 is a software issue. The DTC is stored without a genuine hardware malfunction, meaning the control module itself is not faulty, but its software incorrectly reports an error. This is a common scenario in modern vehicles where complex electronic systems rely heavily on precise software logic.

Production Solution

To address the software anomaly causing the Audi e-tron SOS fault B200000, Audi has developed new software versions for the Emergency Call Module and Communication Unit (ConBox). These optimized software versions aim to correct the conditions under which the DTC B200000 is erroneously set. The updated software has been deployed in production vehicles since calendar week 29 of 2024, ensuring newer vehicles are less likely to experience this specific issue.

Repair Procedure Summary

The solution for the Audi e-tron SOS fault B200000 involves a two-part service procedure. Before beginning, technicians must ensure they are using the most current version of the Offboard Diagnostic Information System (ODIS), with a minimum version of 2025.02.02.

Part 1: Initial Diagnostic and DTC Erasure

1. Access Test Plan: Technicians must navigate to the test plan within ODIS and perform the program "J949 – Control Module for Emergency Call Module and Communication Unit, check control module". This program is typically added automatically to the test plan when DTC B200000 is logged. If not, the test plan filter can be changed from "Standard" to "All" to make the program visible. The function can also be found manually under the path: Self-test >> Diagnostic capable systems >> 0075 – Control Module for Emergency Call Module and Communication Unit -J949- >> 0075 – Electrical components >> Control Module for Emergency Call Module and Communication Unit, check control module.
2. Check and Repeat: After performing the test plan, the technician checks if the DTC B200000 has been erased and if the warning message has disappeared from the instrument cluster. If the message persists, step 1 should be repeated. If the DTC cannot be cleared after multiple attempts, Guided Fault Finding for DTC B200000 should be performed.

Part 2: Software Package Updates

Part 2 involves installing specific software packages depending on the vehicle's model year. These packages address various control units to fix multiple complaints, including the Audi e-tron SOS fault B200000.

• Model Years 2020 and 2021: For these vehicles, a comprehensive software package has been developed. This package is detailed in TSB 2067021, titled "91 MIB3: Garage opener/SXM/Online Radio or other malfunctions B129B11, B129C22, B123B13, B123C13, U044700 or B200000 (MY 2020) or recall 91DZ (MY 2021)". This TSB outlines the distribution and usage of this software package.
• Model Years 2022 and 2023 (and certain 2021 vehicles): A different software package, known as the Customer Service Package, is available for these model years. TSB 2076404, "00 Deployment overview for customer service packages MLB and MQB for MIB3/connectivity box/OCU3/LSR", describes how this package is distributed and used. Billing for this part is handled according to the instructions in TSB 2076404.
• Model Years 2024 and 2025 (and MY2023 with DA005F SW >=40XX): For the latest model years, another software package, the Cluster 3B+ customer service package, is available. TSB 2079416, "91 MMI: overview of customer service packages MLB and MQB for MIB3/ConBox/OCU3/AED2/gateway after UNECE deployment", provides details on its distribution and use. Billing follows the instructions in TSB 2079416.

It is important to note that if the Emergency Call Module and Communication Unit (ConBox), J949 (DA0075), already has one of the specified software versions (0498, 0512, 0513, 0740, 0750, 0751), the update is not necessary as it has already been installed.

Important Warnings

Owners and technicians should be aware of critical information regarding this TSB:

• Timely Performance: All software versions (including 05xx and 07xx) related to this measure were included in TSB revision 2059528/17, specifically for the "91 ConBox High: Emergency call (SOS) fault/LED red, with DTC B200000" issue. It is crucial that this TSB was performed after November 26, 2025, before submitting any feedback or claims related to the repair. This ensures the most up-to-date solution has been applied.
• Persistent DTC: If the DTC B200000 cannot be deleted even after performing Part 1 of the procedure multiple times, technicians are instructed to perform Guided Fault Finding for this DTC. This indicates a potential underlying issue that requires further diagnosis beyond the standard software update.

Warranty Information

Warranty claims for this service bulletin are processed under specific codes. Part One of the solution should be invoiced via TSB 2059528/17. Part Two, which involves the broader software packages, should be invoiced via its respective applicable TSB (2067021, 2076404, or 2079416).

• Service Number: 9145
• Damage Code: 0039
• Labor Operations: GFF (Guided Fault Finding) with codes 0150 0010 (See SRT with associated operations) and 0150 0060 (Labor according to the diagnostic log).
• Claim Comment: As per TSB 2059528/17.

All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual and are subject to review or audit by Audi Warranty.

Revision History

This Technical Service Bulletin, 2059528/17, has undergone several revisions to ensure accuracy and provide the most current information:

• Revision 17: This revision updated the header, including a new software filter. It also revised the condition section by adding a model table and adjusted service directions for software levels.
• Revision 16 (October 24, 2025): This revision specifically updated the service section to include solutions for Model Year 2024/2025 vehicles.
• Revision 15 (June 13, 2025): This revision updated the header by adding more model years and revised the service section with updated verbiage.

Owner Action

If your 2020-2025 Audi is displaying the "Emergency call function: malfunction! Function unavailable. Please contact service" warning or has the Audi e-tron SOS fault B200000, it is recommended to schedule an appointment with an authorized Audi service center. Provide them with the exact warning message and mention TSB 2059528/17. The service center will diagnose the issue and apply the necessary software updates to resolve the problem. This repair is typically covered under warranty if your vehicle is still within its warranty period.

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Source: NHTSA ID: 11026208