MyTeslaMate
BMS family

BMS_f158_SW_Low_Isolation_Wrn

Not Available

What does the BMS_f158_SW_Low_Isolation_Wrn alert mean?

The battery management system (BMS) detects low high voltage (HV) isolation when pack contactors were closed.

What you'll see in your Tesla

  • Not Available

What triggers it

The BMS has detected that the HV isolation dropped below the minimum warning threshold multiple times in a short period.

When it clears

The BMS detects that HV isolation is above the minimum warning threshold.

Potential impact

This alert is primarily informational and is used for logging purposes. It is intended to flag low isolation issues before they are serious enough to prevent driving.

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.