HVBATT family
HVBATT_a047_CompressorHvilUnknown
High voltage system error detected
What does the HVBATT_a047_CompressorHvilUnknown alert mean?
The Compressor (CMPT) High Voltage Interlock Loop (HVIL) is reporting as unknown, breaking the overall High Voltage Battery (HVBATT) HVIL.
What you'll see in your Tesla
- High voltage system error detected
- Vehicle may not restart - Service is required
What triggers it
The CMPT HVIL is reported as unknown.
When it clears
The CMPT HVIL must be closed or open.
Potential impact
Vehicle may be unable to enter drive and may be unable to charge.
Affected models
Cybertruck
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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.