HVREX family
HVREX_a099_PyroDeploymentFault
Not Available
What does the HVREX_a099_PyroDeploymentFault alert mean?
The Range Extender Battery Management System (BMS) or High Voltage Controller (HVCON) detects there was an attempt to deploy the pyro, but the attempt was unsuccessful.
What you'll see in your Tesla
- Not Available
What triggers it
Vehicle firmware could not successfully trigger a pyro deployment, or there was an attempt to deploy the pyro while the deployment test was actively running on the pyro.
When it clears
Clears automatically.
Potential impact
The vehicle may be unable to drive or charge.
Affected models
Cybertruck
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.