2023-2026 Audi Emergency Call System Fault B200000 TSB

Symptoms

Owners of affected 2023-2026 Audi vehicles may observe a warning message in the instrument cluster stating: "Emergency call function: malfunction! Function unavailable. Please contact service." This message is often accompanied by a red illuminated SOS LED, indicating a potential issue with the emergency call system. This condition is linked to the Audi emergency call fault B200000.

Fault Codes / DTCs

A diagnostic scan of the vehicle will typically reveal 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	Module
B200000	Control module faulty (active / static)	Emergency Call Module and Communication Unit (ConBox), J949

Other related DTCs that might be addressed by the same software packages include B129B11, B129C22, B123B13, B123C13, and U044700.

Technical Background

Audi has identified that the presence of DTC B200000 and the associated warning message is primarily due to a software issue within the ConBox High unit. This means the fault code is often stored without an actual hardware malfunction. The system incorrectly detects a problem, triggering the "Emergency call function: malfunction!" warning.

A production solution involving optimized software versions for the Emergency Call Module and Communication Unit (ConBox) has been deployed since calendar week 29/2024 to prevent this issue in new vehicles. For existing vehicles, a service procedure is available.

Repair Procedure Summary

The repair for the Audi emergency call fault B200000 involves a two-part process, primarily focusing on software updates.

Part 1: Initial Diagnostic and Software Update

1. Technicians must ensure they are using the most current ODIS version (minimum > 2025.02.00).
2. Access the diagnostic test plan and perform the program "J949 – Control Module for Emergency Call Module and Communication Unit, check control module." This program is automatically added to the test plan when DTC B200000 is logged. It can also be found manually under the ODIS 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.
3. After running the program, the technician checks if the DTC B200000 has been cleared and if the "Emergency call function: malfunction!" message has disappeared from the instrument cluster. If the message persists, Part 1 should be repeated. If the DTC cannot be deleted after multiple attempts, Guided Fault Finding for this DTC should be performed.

Part 2: Comprehensive Software Packages (if needed) Depending on the vehicle's model year, a broader software package may be required to address this and other potential issues.

• For Model Years 2020 and 2021: A software package was developed to fix multiple control unit complaints. This 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)."
• For Model Years 2022 and 2023 (and certain 2021 vehicles): A Customer Service Package for control units is available, as described in TSB 2076404, "00 Deployment overview for customer service packages MLB and MQB for MIB3/connectivity box/OCU3/LSR."
• For Model Years 2024 and 2025 (and MY2023 with DA005F SW >=40XX): Another customer service package is available, detailed in TSB 2079416, "91 MMI: overview of customer service packages MLB and MQB for MIB3/ConBox/OCU3/AED2/gateway after UNECE deployment."

Billing for Part 1 is done via TSB 2059528/16, while Part 2 is invoiced via the specific applicable TSB for that part.

Owner Action

If your 2023-2026 Audi vehicle is displaying the "Emergency call function: malfunction! Function unavailable. Please contact service" warning message, has a red SOS LED, or you suspect an Audi emergency call fault B200000, it is recommended to schedule an appointment with an authorized Audi service center. Since this is a known software issue addressed by a Technical Service Bulletin, the repair may be covered under warranty. If your vehicle is outside of warranty, this TSB serves as informational guidance, and costs may apply.

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Source: NHTSA ID: 11025363