2022-2024 Audi Vehicles Start/Stop System Fault TSB

Owners of certain 2022-2024 Audi vehicles may encounter a specific Audi start/stop fault where the start/stop system is not functioning and a warning message appears in the instrument cluster. This issue is detailed in Audi Technical Service Bulletin (TSB) 2074810/2, which supersedes TSB 24-61 dated July 31, 2024.

This TSB specifically applies to vehicles with very low mileage, typically under 32 miles (50 km). The bulletin outlines a procedure for dealerships to resolve this condition.

Symptoms

Owners typically report the following issues related to the Audi start/stop fault:

• The instrument cluster displays the message: "Start/stop system: system fault. Function unavailable. Please contact workshop".
• Alternatively, the message "Vehicle start system: fault. Please contact workshop" is shown.
• The start/stop system does not operate as intended.
• These symptoms occur in vehicles with a mileage of less than 32 miles (50 km).

Diagnosis / Trigger Conditions

This particular Audi start/stop fault is often attributed to the vehicle still being in production mode or the start/stop system not being properly activated during its initial use. Dealership technicians will find that there are no event memory entries (DTCs) in any control units indicating a restriction of the start/stop function. The start/stop system is designed to activate automatically once the vehicle has covered 32 miles (50 km).

Important Warnings

Owners should be aware of a critical limitation regarding this issue:

• Once the vehicle has a mileage of 50 km/32 miles or more, the start/stop system can no longer be set to "not active".

Repair Procedure Summary

To resolve this Audi start/stop fault, technicians will perform a specific procedure using the ODIS tester to deactivate production mode and activate the start/stop system. The steps involve:

1. Setting adaptation channel 04FC in the engine control unit to a value of 00 00 00 using the ODIS tester.
2. Turning Terminal 15 (ignition) OFF.
3. Waiting for 10 seconds during the post-run phase.
4. Turning Terminal 15 ON.
5. This process deactivates production mode, automatically deletes any related event memory entries, and turns off the EPC and exhaust emissions warning lamps.
6. The start/stop system is then activated in the engine control unit via adaptations, specifically by setting adaptation channel $0927 to "active".
7. Finally, a road test is performed to confirm the start/stop system is fully functional.

Warranty Information

Warranty claims for this repair should be submitted according to the Audi Warranty Policies and Procedures Manual. The relevant codes for this service are:

• Service Number: 2470 for gas engines or 2360 for diesel engines.
• Damage Code: 0039.
• Labor Operations: Programming the electronic injection system control unit (for gas engines) or the EDC control unit (for diesel engines) is covered under labor codes 2470 2599 or 2360 2599, respectively, each allotted 20 time units (TU).

If the vehicle is outside of its warranty period, this Technical Service Bulletin serves as informational guidance only.

Owner Action

If your 2022-2024 Audi is displaying a "Start/stop system fault" message and has less than 32 miles on the odometer, it is recommended to contact your authorized Audi dealership. They will be able to perform the necessary diagnostic and repair procedures outlined in TSB 2074810/2 to resolve the issue.

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Source: NHTSA ID: 11009327