2021-2022 Audi e-tron GT Flashing Warning Lights TSB

Why Your e-tron GT Flashing Warning Lights Are Normal During Service

Owners of 2021-2022 Audi e-tron GT and Audi RS e-tron GT models may observe the traction, brake, and ABS warning lights flashing simultaneously on the instrument cluster while their vehicle is undergoing diagnostic testing at a service center. This behavior is not indicative of a fault or a problem with the vehicle's systems. Instead, it is a normal operational characteristic when the vehicle enters a specific diagnostic state.

This Technical Service Bulletin (TSB 00 21 52 2064248/1), issued on September 16, 2021, clarifies that this visual cue simply confirms the vehicle is in a diagnostic mode. The e-tron GT flashing warning lights are a signal to technicians that the diagnostic tester is actively communicating with various control modules.

Technical Background

When a diagnostic tester is connected to an Audi e-tron GT or RS e-tron GT to access its various electronic control modules, the vehicle automatically transitions into a diagnostic state. During this state, the vehicle's systems communicate with the diagnostic equipment, and as a visual indicator, the traction, brake, and ABS warning lights will begin to flash simultaneously. This coordinated flashing sequence is by design and does not signify an error condition within the vehicle's braking or traction control systems.

Figure 1 in the original bulletin illustrates this phenomenon, showing the dashboard with the brake and ABS lights illuminated and flashing, alongside other vehicle information. This visual confirmation helps technicians understand the vehicle's current operational mode during service.

Important Warnings for Owners

• Normal Diagnostic Behavior: The flashing of the "traction, brake, and ABS warning lights are flashing simultaneously" during diagnostic sessions is a normal and expected behavior. It does not indicate a malfunction or a need for repair.
• Post-Service Check: If any of these lights remain illuminated or continue to flash after the diagnostic session has concluded and the vehicle has been returned to normal operation, then a separate diagnosis should be performed to investigate a potential underlying issue.
• Warranty Information: This TSB is purely informational. It outlines a normal operating condition and does not cover any repair procedures. Therefore, it is not applicable to any Audi Warranty claims.

What Owners Should Know

There are no customer concerns related to this condition, as it is typically observed by technicians during routine service, pre-delivery inspection (PDI), or other diagnostic work. If you are ever present when your 2021-2022 Audi e-tron GT is undergoing diagnostic testing and you see the e-tron GT flashing warning lights, rest assured that this is a normal part of the diagnostic process. The lights will cease flashing once the diagnostic session is completed and the vehicle exits this special state. This TSB helps prevent unnecessary repairs or concerns about a non-existent problem.

No Production Solution or Repair Needed

Since the flashing of these warning lights is a normal diagnostic indicator and not a fault, there is no production solution or repair procedure required. This TSB serves to inform technicians and owners about this expected behavior, ensuring that the e-tron GT flashing warning lights are correctly interpreted.

NHTSA ID: 10201490