BMS family
BMS_w178_OvUvRegWrong
Unable to charge
What does the BMS_w178_OvUvRegWrong alert mean?
Detect if the contents of the COV or CUV registers are wrong.
What you'll see in your Tesla
- Unable to charge
- Service is required
What triggers it
COV or CUV disable bit is asserted for more than 10 consecutive seconds.
When it clears
Disable bit in COV and CUV registers are de-asserted
Potential impact
Failure to detect HW overvoltage / undervoltage scenarios
Affected models
Model S 2012-2020
Model X 2015-2020
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.