ESP family
ESP_a283_secondaryCollisionMitigationActive
Collision detected
What does the ESP_a283_secondaryCollisionMitigationActive alert mean?
The Restraints Control Module (RCM) reports an accident and commands the Electronic Stability Program (ESP) electronic control unit (ECU) to actuate the brakes to prevent a secondary collision.
What you'll see in your Tesla
- Collision detected
- Brakes applied and acceleration disabled
What triggers it
The RCM reports an accident to the ESP ECU.
When it clears
The vehicle comes to a complete stop or the driver overrides the ESP by using the accelerator pedal.
Potential impact
The ESP ECU may engage the brakes.
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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.