2015-2026 Audi Airbag Warning Light with DTC B13BCF2

Audi has released Technical Service Bulletin (TSB) 69 24 11 2056406/5 to address instances where the airbag warning light illuminates in the instrument cluster, accompanied by diagnostic trouble code (DTC) B13BCF2. This TSB, which supersedes previous bulletin 69 23-91 dated June 30, 2023, applies to all Audi vehicles from model years 2015 to 2026.

This bulletin clarifies that the presence of DTC B13BCF2, labeled as "Multiple collision brake No function," is typically an indicator of an underlying issue rather than the root cause itself. The Audi airbag warning light B13BCF2 issue is a common concern for owners.

Symptoms

Owners of affected Audi vehicles may observe the following:

• The "airbag warning light is illuminated in the instrument cluster."

Fault Codes / DTCs

The primary diagnostic trouble code associated with this issue is:

Code	Description	Module
B13BCF2	Multiple collision brake No function	Airbag control module, J234

This DTC can be active/static or passive/sporadic.

Diagnosis and Trigger Conditions

The "Multiple collision brake" system is managed by the ABS control module, J104, and is an integral part of the ABS/ESC functionality. When the ABS control module detects an ABS/ESC-relevant error, the "Multiple collision brake" system is deactivated. This deactivation triggers the ESC and airbag warning lights to illuminate in the instrument cluster, and DTC B13BCF2 is stored in the airbag control module.

If the brake system error is sporadic and does not recur, the ESC warning light will turn off after the next ignition cycle. Any DTCs stored in the ABS control module are automatically erased after 40 ignition cycles if not detected again. However, the airbag warning light will remain on permanently until DTC B13BCF2 in the airbag control module is manually cleared. The "Multiple collision brake" will also remain deactivated as long as DTC B13BCF2 is present.

Important Warnings for Owners

Audi explicitly states that replacing the airbag control module will not resolve this issue. Claims for any replaced parts will be subject to review, as the module itself is not the root cause of the Audi airbag warning light B13BCF2 problem. The airbag warning light serves as an indicator that the "Multiple collision brake" has been deactivated by the brake control module, meaning it is a symptom, not the underlying fault.

Repair Procedure Summary

Addressing the Audi airbag warning light B13BCF2 involves a specific diagnostic and repair sequence:

1. Connect the vehicle to ODIS Service and perform a Guided Fault Finding (GFF) scan.
2. If other DTCs are present that could have caused the ABS/ESC functionality deactivation, follow the GFF instructions to identify and eliminate the root cause. Once the root cause is resolved, clear DTC B13BCF2 from the airbag control module.
3. If no other DTCs are found that explain the ABS/ESC deactivation, proceed to erase DTC B13BCF2 in the airbag control module.
4. If DTC B13BCF2 cannot be cleared immediately, disconnect the scan tool from the diagnostic link connector (DLC). Park the vehicle, turn the ignition off, and lock the vehicle. After 30 minutes, attempt to clear the DTC again.
5. Once B13BCF2 has been successfully cleared, road test the vehicle to confirm that no faults return.
6. Release the vehicle to the customer without attempting additional repairs if no faults reappear.
7. If the customer experiences this concern again, an immediate vehicle scan with GFF should be performed to determine the root cause.

Warranty Information

Warranty claims for this issue, identified by Service Number 6953 and Damage Code 0039, are covered under Audi's New Vehicle Limited Warranty for up to 48 months or 50,000 miles. For Certified Pre-Owned (CPO) vehicles, coverage is under G10, requiring owner verification. If the vehicle is outside of any warranty, this Technical Service Bulletin is for informational purposes only.

Time Allowance

Diagnostic time for GFF is 0150 0000 (maximum 50 Time Units).

• Road test prior to service: No allowance (0 TU)
• Road test after service: 0121 0004 (10 TU)

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