2021 Audi Lineup Speed Warning Threshold Settings Lost TSB

Owners of certain 2021 Audi vehicles may notice that their traffic sign based speed warning threshold settings are not being saved. This issue, where the custom speed warning setting is lost after the vehicle enters a sleep cycle, has been identified by Audi as a software bug.

Audi has released Technical Service Bulletin (TSB) 90 20 78 2061157/1 to address this concern, indicating that a software update is being developed to permanently resolve the problem. This TSB is informational, advising dealerships on the nature of the issue and the upcoming solution.

Symptoms

The primary symptom reported by customers is the loss of the customized "traffic sign based speed warning threshold" setting. After setting a specific threshold, such as 15 mph, the setting reverts to its default or disappears entirely once the vehicle has been turned off and entered a sleep cycle. This means the Audi e-tron speed warning threshold lost setting needs to be reconfigured every time the vehicle is used.

Fault codes / DTCs

This service bulletin does not specify any diagnostic trouble codes (DTCs) associated with this particular issue. The problem is attributed to a software bug rather than a fault that triggers a specific code. The affected component is the driver assistance systems control module, identified as J1121 (address word 00A5).

What the service bulletin says

Audi's TSB 90 20 78 2061157/1 explains that a software bug within the J1121 driver assistance systems control module (address word 00A5) is responsible for the speed warning threshold setting not being stored permanently. The bulletin states that a new software version, 0365, is planned for production and customer service to correct this issue. This software update is expected to be available in the first quarter of 2021.

The TSB advises service technicians not to perform any repairs or replace components for this condition, as it will not resolve the customer's concern. Instead, technicians are instructed to inform customers that a solution is forthcoming and to create a PSS (Pending Service Solutions) record.

What to do

If you own a 2021 Audi model experiencing the Audi e-tron speed warning threshold lost issue, it's important to understand that a fix is in development. According to Audi's Technical Service Bulletin 90 20 78 2061157/1, there is no immediate repair or component replacement that will solve the problem.

You should contact your authorized Audi dealership to inquire about the availability of the software update (version 0365) for the J1121 control unit. You can reference TSB 90 20 78 2061157/1 when speaking with your service advisor. Until the software update is applied, you may need to manually reset your traffic sign based speed warning threshold setting each time you drive.

Source: NHTSA ID: 10182050