UMC family
UMC_a011_proxDisconnected
Charging equipment communication error
What does the UMC_a011_proxDisconnected alert mean?
UMC proximity line disconnected or vehicle is not providing proximity voltage
What you'll see in your Tesla
- Charging equipment communication error
- Try again or try different equipment
What triggers it
Proximity line in charge cable has no voltage present but a vehicle is connected
When it clears
Proximity line in charge cable rises to a valid voltage level
Potential impact
UMC will not allow charging while the proximity line is broken because it cannot determine if the cable is latched
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.