2021-2025 Audi Emergency Call System Fault TSB

Owners of certain 2021-2025 Audi vehicles may encounter an 'Emergency call function: malfunction! Function unavailable. Please contact service' message displayed in the instrument cluster, along with a red SOS LED. This issue is typically linked to a stored Diagnostic Trouble Code (DTC) B200000, indicating a faulty control module within the emergency call system. Audi has released Technical Service Bulletin (TSB) 2059528/18 to address this concern with a software-based solution.

Symptoms

Owners will typically observe the following symptom related to this issue:

• An 'Emergency call function: malfunction! Function unavailable. Please contact service' warning message displayed in the instrument cluster.
• The SOS LED (light-emitting diode) on the ConBox High module may illuminate red.

Fault Codes / DTCs

The primary diagnostic trouble code associated with this condition is:

Code	Description	Module
B200000	Ctrl. Module Faulty (active / static)	Emergency Call Module and Communication Unit (ConBox), J949

This DTC indicates an internal fault within the control module responsible for the emergency call system.

Technical Background

According to Audi, the root cause of the e-tron emergency call fault and the associated DTC B200000 is a software issue. The DTC is stored without a valid reason, leading to the erroneous warning message and red LED. New software versions for the Emergency Call Module and Communication Unit (ConBox) have been developed and deployed since calendar week 29/2024 to optimize the DTC setting conditions.

Repair Procedure Summary

The repair involves a two-part process, primarily focusing on software updates and diagnostic checks:

Part 1: Initial Diagnostic and DTC Clearing

1. Ensure the diagnostic tool (ODIS) is running the most current version (at least 2025.11.02).
2. Access the test plan in ODIS and perform the program "J949 – Control Module for Emergency Call Module and Communication Unit, check control module." This program is automatically added if DTC B200000 is logged.
3. After running the program, check if the DTC B200000 has been cleared and the warning message has disappeared from the instrument cluster. If the message persists, repeat step 2.
4. If the DTC cannot be deleted after multiple attempts, Guided Fault Finding should be performed for the DTC.

Part 2: Software Update Package Application This part involves applying specific software update packages depending on the vehicle's model year and existing hardware/software combinations. These packages address various complaints, including the e-tron emergency call fault.

• For model years 2020 and 2021: A software package is available to fix multiple control unit complaints. Refer to TSB 2067021 (91 MIB3: Garage opener/SXM/Online Radio or other malfunctions B129B11, B129C22, B123B13, B123C13, U044700 or B200000 (MY 2020) or recall 91DZ (MY 2021)) for distribution and usage instructions.
• For model years 2022 and 2023: A separate software package is available as part of the Customer Service Package. Refer to TSB 2076404 (00 Deployment overview for customer service packages MLB and MQB for MIB3/connectivity box/OCU3/LSR) for details.
• For model years 2024 and 2025: Another software package is available. Refer to TSB 2079416 (91 MMI: overview of customer service packages MLB and MQB for MIB3/ConBox/OCU3/AED2/gateway after UNECE deployment) for instructions.

It's important to note that if the Emergency Call Module and Communication Unit (ConBox), J949 (DA 0075) already has one of the following software versions (0498, 0512, 0513, 0740, 0750, 0751), the update may not be necessary as it has already been installed.

Required Tools or Parts

• ODIS Diagnostic System: Must be running version 2025.11.02 or newer.
• Software Update Packages: Specific packages will be downloaded and installed by the dealer based on the vehicle's model year and current software.

Owner Action

If you are experiencing the 'Emergency call function: malfunction!' warning or a red SOS LED in your 2021-2025 Audi, it is recommended to schedule an appointment with an authorized Audi service center. The diagnostic and repair procedure, which addresses the e-tron emergency call fault, involves specialized diagnostic equipment and software updates that can only be performed by a dealership. If your vehicle is still under warranty, this service should be covered. For vehicles outside of warranty, this Technical Service Bulletin is informational only, and costs may apply.

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Source: NHTSA ID: 11030991