VCLEFT family
VCLEFT_a309_brakeSwitchFaulted
Not Available
What does the VCLEFT_a309_brakeSwitchFaulted alert mean?
Brake Switch Faulted: power rail (5V_MAIN_EXT) required for brake switch reads < 4.5V
What you'll see in your Tesla
- Not Available
What triggers it
Brake Switch Faulted: power rail (5V_MAIN_EXT) required for brake switch reads < 4.5V
When it clears
Restore 5V main rail
Potential impact
Vehicle controllers will not be made aware of the brake being pressed
Affected models
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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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.