2019-2021 Audi Driver Assist System DTC B170AF1 B200FF3

Audi has issued Technical Service Bulletin (TSB) 2056015/2 to address specific diagnostic trouble codes (DTCs) that may be stored in the driver assist system control module after a software update. This TSB, dated March 2, 2021, supersedes an earlier bulletin, Group 90 number 19-27, which was dated August 30, 2019. The update was issued to revise the header and include additional applicable models and model years, ensuring comprehensive coverage for the Audi B170AF1 B200FF3 issue.

Symptoms

Owners of affected 2019-2021 Audi vehicles will typically not notice any symptoms or warning lights related to this issue. The presence of DTC B170AF1 or B200FF3 is usually discovered by technicians during routine pre-delivery inspection (PDI) or other diagnostic work. These codes indicate a configuration issue within the driver assist system's control module, specifically J1121 (address word 00A5).

Fault Codes / DTCs

The following diagnostic trouble codes may be stored in the control module for driver assist systems, J1121 (address word 00A5), after a software update:

Diagnosis / Trigger Conditions

The Audi B170AF1 B200FF3 issue is specifically triggered after a software update has been performed on the control module for driver assist systems (J1121). The TSB notes that there are no customer-reported concerns associated with these codes; they are identified during routine diagnostic work or vehicle preparation. This indicates that the codes do not typically manifest as a noticeable operational fault to the driver.

Repair Procedure Summary

The repair for the Audi B170AF1 B200FF3 codes involves a straightforward diagnostic process that does not require replacing any control modules. Technicians should perform the following steps using the appropriate diagnostic tools:

1. Execute the test plan "Check control unit configuration." This step verifies the current configuration settings of the driver assist control module.
2. Execute the test plan "Replace control unit." It is crucial to note that despite the name of this test plan, this step is performed without actually replacing the control modules. The purpose is to re-initialize or re-configure the existing control unit.
3. After completing both test plans, the diagnostic trouble codes (DTCs) can be cleared from the system. This procedure ensures the control module is correctly configured post-software update.

Important Warranty Information

This repair is generally covered under Audi's warranty policies. For new vehicles, the claim type is "110" and coverage extends up to 48 months or 50,000 miles. For Audi Certified Pre-Owned (CPO) vehicles, the claim type is "G10," and it requires verification of ownership. If the vehicle is outside of its warranty period, this Technical Service Bulletin serves as informational guidance only, meaning costs may apply.

The specific warranty details for this procedure are:

• Service Number: 9093
• Damage Code: 0039
• Diagnostic Time: GFF (0150 0000), with time stated on the diagnostic protocol (maximum 50 Time Units, TU).
• Road Test Allowance: No allowance (0 TU) for both road tests prior to and after the service procedure.
• Claim Comment: Claims should be submitted as per TSB # 2056015/2 and must adhere to the Audi Warranty Policies and Procedures Manual. All claims are subject to review or audit by Audi Warranty.

Source: NHTSA ID: 10188599