UI family
UI_a155_UsbFrontHubUnavailable
Not Available
What does the UI_a155_UsbFrontHubUnavailable alert mean?
The front hub appears disconnected or powered off.
What you'll see in your Tesla
- Not Available
What triggers it
The front USB hub device has been removed from the system.
When it clears
Waking the vehicle to accessory power with the hub attached should clear the alert.
Potential impact
If the vehicle is awake and this alert is present, the hub may have faulted.
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
Semitruck
Track your Tesla's alerts automatically
Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.