HVP family
HVP_w021_PyroMiaFault
Vehicle may not restart
What does the HVP_w021_PyroMiaFault alert mean?
The vehicle detects a condition affecting one or more of the pyrotechnic (pyro) fuses.
What you'll see in your Tesla
- Vehicle may not restart
- Service is required
What triggers it
The diagnostic test on one or more of the pyro fuses is unsuccessful. This can indicate the pyro fuse has blown.
When it clears
The pyro fuse diagnostic test passes.
Potential impact
The High Voltage (HV) contactors are not allowed to close.
Affected models
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.