TAS family
TAS_a099_UI_MIA
Not Available
What does the TAS_a099_UI_MIA alert mean?
One or more of the messages the Tesla Adaptive Suspension (TAS) module receives periodically from the User Interface (UI) are not being received by the ECU.
What you'll see in your Tesla
- Not Available
What triggers it
One or more of the expected messages from UI is not received. Messages may be missing, are not received at the expected rate, or have an invalid checksum / counter.
When it clears
TAS starts receiving the expected messages from UI.
Potential impact
Adaptive suspension functionality may be reduced.
Affected models
Model 3 2024+
Model Y 2025+
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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.