VCFRONT family
VCFRONT_a257_portExpanderVOR
Not Available
What does the VCFRONT_a257_portExpanderVOR alert mean?
The front vehicle controller (VCFRONT) has detected a condition affecting a group of eFuses, making an eFuse system reset necessary.
What you'll see in your Tesla
- Not Available
What triggers it
VCFRONT detects a group of eFuses with a common power source have all tripped (circuit opened).
When it clears
The integrated circuit (I2C) port expander connecting the microcontroller and eFuse enable pins is reset after a retry or sleep cycle.
Potential impact
Vehicle may be unable to drive.
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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.