ESP family
ESP_a091_CANUndervoltage
Not Available
What does the ESP_a091_CANUndervoltage alert mean?
CAN undervoltage detected.
What you'll see in your Tesla
- Not Available
What triggers it
CAN network voltage below specification
When it clears
Check PARTY and CHASSIS can network for proper voltage/termination/short circuits
Potential impact
VDC/TC disabled, EBR functionality disabled
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.