HVBATT family
HVBATT_a742_VshFailure
Vehicle may not restart
What does the HVBATT_a742_VshFailure alert mean?
The battery management system (BMS) has detected a high voltage sense harness (VSH) impedance.
What you'll see in your Tesla
- Vehicle may not restart
- Service is required
What triggers it
The BMS detects a VSH impedance value above the threshold.
When it clears
All bricks report VSH impedance values within the threshold.
Potential impact
Inability to charge, drive, or support the low voltage (LV) system
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.