2021-2026 Audi Emergency Call System Fault B200000

Symptoms

Owners of affected 2021-2026 Audi vehicles may notice a red SOS light illuminated and a specific warning message displayed in the instrument cluster. This indicates a problem with the vehicle's emergency call system.

The verbatim warning message you might see is: "Emergency call function: malfunction! Function unavailable. Please contact service". This message directly points to a failure in the system responsible for automatic emergency calls.

Fault Codes / DTCs

When diagnosing this issue, technicians will typically find the following Diagnostic Trouble Code (DTC) stored in the Emergency Call Module and Communication Unit (ConBox), also known as J949 (address word 0075):

Code	Description	Storage state
B200000	Control module faulty	active / static

This B200000 code indicates that the control module itself is reporting a fault, even if the underlying cause is a software anomaly.

Technical Background

According to Audi, the presence of the Audi emergency call fault B200000 is often due to a software issue. The diagnostic trouble code is stored without a genuine hardware fault. To address this, new software versions for the Emergency Call Module and Communication Unit (ConBox) have been optimized and deployed in production since calendar week 29 of 2024.

Repair Procedure Summary

The solution to this complaint involves a two-part service procedure, starting with an initial diagnostic check and potentially followed by a software update. It is crucial for technicians to use the most current ODIS version, specifically minimum > 2025.02.00.

Part 1: Initial Diagnostic and DTC Clearing

1. Technicians should perform the program "J949 – Control Module for Emergency Call Module and Communication Unit, check control module" from the test plan. This program is automatically added when DTC B200000 is logged. Alternatively, it can be found 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. If the program does not appear automatically, the test plan filter can be changed from "Standard" to "All" to locate it.
3. After running the program, the technician will check 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 clears, proceed to Part 2 if necessary.

Part 2: Software Package Updates This part involves applying specific software packages depending on the vehicle's model year:

• Model years 2020 and 2021: A software package designed to fix multiple complaints for a group of control units is available. This is detailed in TSB 2067021, which covers issues like 91 MIB3, Garage opener/SXM/Online Radio malfunctions (B129B11, B129C22, B123B13, B123C13, U044700) or the Audi emergency call fault B200000, and recall 91DZ (MY 2021).
• Model years 2022 and 2023 (+ certain vehicles from 2021): A customer service package is being developed to address multiple complaints. TSB 2076404 provides an overview of the deployment for customer service packages for MLB and MQB platforms related to MIB3/connectivity box/OCU3/LSR.
• Model years 2024 and 2025: A customer service measure is currently under development, with a solution anticipated in Q3/2025.

Important Warnings

If the DTC B200000 cannot be deleted even after performing Part 1 multiple times, technicians are advised to perform Guided Fault Finding for this specific DTC. This indicates a more complex underlying issue that requires further investigation beyond a simple software reset.

Warranty Information

For warranty claims, Part 1 of the repair should be invoiced via TSB 2059528/14. Part 2 should be invoiced via the applicable TSB for that specific software package. The claim type is informational only if the vehicle is outside of warranty. The service number is 9145, and the damage code is 0039. Labor operations GFF (0150 0010, 0150 0060) are used for these repairs.

Owner Action

If your 2021-2026 Audi is displaying the "Emergency call function: malfunction! Function unavailable. Please contact service" message or a red SOS light, it is recommended to schedule an appointment with an authorized Audi service center. They will be able to diagnose the Audi emergency call fault B200000 and apply the necessary software updates or perform further diagnostics as outlined in TSB 2059528/14.

---

Source: NHTSA ID: 11017614