ESP family
ESP_a119_hbbActive
Not Available
What does the ESP_a119_hbbActive alert mean?
The Electronic Stability Program (ESP) detects that the brake pressure is too low for the given brake pedal stroke, causing the Hydraulic Brake Boost (HBB) to be activated.
What you'll see in your Tesla
- Not Available
What triggers it
The HBB is activated because the brake pressure is too low for a given brake pedal stroke.
When it clears
The HBB is no longer active.
Potential impact
Braking performance may be reduced. The ESP pump may be activated to increase the brake pressure.
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.