DI family
DI_a250_tasSpeedLimitActive
Adaptive ride control unavailable
What does the DI_a250_tasSpeedLimitActive alert mean?
The Tesla Adaptive Suspension (TAS) electronic control unit (ECU) is limiting the top speed and power of the drive unit(s).
What you'll see in your Tesla
- Adaptive ride control unavailable
- Vehicle speed limited - Proceed with caution
What triggers it
TAS has detected a condition affecting the adaptive suspension damping system, or TAS is not communicating as expected with the Drive Interface (DI).
When it clears
TAS is no longer limiting drive unit speed and power.
Potential impact
Drive unit torque and top vehicle speed are reduced.
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
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.