HVBATT_a743_BleedFetFailure
Not Available
What does the HVBATT_a743_BleedFetFailure alert mean?
A bleed Field-Effect Transistor (FET) on the Battery Management Board (BMB) is not operating as designed. This will prevent the battery from balancing the brick by decreasing the brick voltage.
What you'll see in your Tesla
- Not Available
What triggers it
Upon a periodic wake, after an ECU reset, or every 6 hours, the Battery Management System (BMS) will test all bleed switches by switching them on in turn. If the sensed brick voltage does not significantly change, this alert is set.
When it clears
The bleed test reports sufficient voltage change across each brick.
Potential impact
There may be a decrease in available energy to the vehicle, reducing range and LV support.
Affected models
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