2023-2026 Audi Emergency Call System Fault B200000

Owners of 2023-2026 Audi vehicles may encounter a warning message in their instrument cluster indicating an issue with the emergency call system. This problem, identified as an Audi SOS fault B200000, is detailed in Technical Service Bulletin (TSB) 2059528/13, released on February 25, 2025. The TSB explains that the fault is due to a software issue within the emergency call module, also known as the ConBox (J949).

Symptoms

Owners will typically observe the following in their vehicle's instrument cluster:

• A red LED indicator related to the emergency call system.
• The warning message: "Emergency call function: malfunction! Function unavailable. Please contact service".

These symptoms indicate a problem with the vehicle's ability to perform emergency calls, which is a critical safety feature.

Fault Codes / DTCs

When diagnosing this issue, technicians will find a specific Diagnostic Trouble Code (DTC) stored in the Emergency Call Module and Communication Unit (ConBox, J949):

Diagnostic Address	Diagnostic Trouble Code	Fault Symptom	Storage State
0075	B200000	Control module faulty	static

This DTC B200000 indicates that the control module itself is faulty, even though the underlying cause is a software glitch rather than a hardware failure.

Diagnosis / Trigger Conditions

According to Audi, the Audi SOS fault B200000 is a software issue where the DTC is stored without a genuine hardware malfunction. The conditions for setting this DTC have been optimized with new software versions for the Emergency Call Module and Communication Unit (ConBox), with deployment starting in calendar week 29 of 2024.

Repair Procedure Summary

The solution for this complaint involves a two-part process, requiring the use of the latest ODIS diagnostic software (minimum version 2025.02.00).

Part 1: Initial Diagnostic and DTC Erase

1. Technicians must perform the program "J949 – Control Module for Emergency Call Module and Communication Unit, check control module" via the ODIS test plan. This program is automatically added if DTC B200000 is logged. It can also be manually accessed under ODIS: 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. After running the program, 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, Part 1 should be repeated. If the issue remains, proceed to Guided Fault Finding for this DTC.

Part 2: Software Updates (Model Year Dependent)

• For Model Years 2020 and 2021: A software package is available to address this and other complaints. This package is detailed in TSB 2067021, which covers issues like MIB3, Garage opener/SXM/Online Radio malfunctions (B129B11, B129C22, B123B13, B123C13, U044700, B200000), or recall 91DZ.
• For Model Years 2022 and 2023 (and certain 2021 vehicles): A separate customer service package is being developed. TSB 2076404 provides deployment overview for these packages, which apply to MLB and MQB platforms with MIB3/connectivity box/OCU3/LSR.
• For Model Years 2024 and 2025: A customer service measure is currently under development, with a solution anticipated in Q3/2025.

Important Warnings

• ODIS Test Plan Filter: If the required program is not automatically displayed in the ODIS test plan, technicians should change the test plan filter from "Standard" to "All" to make it visible.
• Persistent DTC: If the DTC B200000 cannot be deleted after multiple attempts of Part 1, Guided Fault Finding for this specific DTC should be performed.
• Warranty Coverage: If your vehicle is outside of any warranty, this Technical Service Bulletin serves as informational guidance only, implying potential costs for the owner.

Revision History

This Technical Service Bulletin has undergone several revisions to refine the diagnostic and repair procedures:

• Revision 13 (February 25, 2025): Revised header, added MY25, updated ODIS version requirements, and separated instructions for additional model years.
• Revision 12 (August 30, 2024): Revised header, added MY25 Q7.
• Revision 11 (July 18, 2024): Revised Production Solution and Service (updated measure).

Required Tools or Parts

Technicians will need access to the ODIS diagnostic system with a minimum software version of 2025.02.00 to properly diagnose and resolve the Audi SOS fault B200000.

Owner Action

If your 2023-2026 Audi is displaying the "Emergency call function: malfunction! Function unavailable. Please contact service" message or has a red emergency call LED, it is recommended to schedule an appointment with an authorized Audi service center. They will be able to perform the necessary diagnostic steps and software updates as outlined in TSB 2059528/13.