HVREX family
HVREX_a201_ModuleTempSenseFault
Vehicle may not restart
What does the HVREX_a201_ModuleTempSenseFault alert mean?
HVBATT detects that any module in the battery pack cannot measure temperature properly.
What you'll see in your Tesla
- Vehicle may not restart
- Service is required
What triggers it
A battery monitoring board (BMB) detects that all of the thermistors on a module are BAD or SNA.
When it clears
HVBATT detects that all modules in the battery pack are sensing temperature nominally.
Potential impact
Inability to charge, drive, or support the low voltage (LV) system.
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.