UMC family
UMC_a009_vehConnOT
Cannot charge - Charge handle temperature high
What does the UMC_a009_vehConnOT alert mean?
UMC vehicle connector exceeded temperature threshold
What you'll see in your Tesla
- Cannot charge - Charge handle temperature high
- Check charge handle or charge port for debris
What triggers it
UMC vehicle connector (charge handle) temperature has risen above 75 C
When it clears
UMC vehicle connector (charge handle) temperature has fallen below 73 C
Potential impact
UMC will not allow charging until the charge handle cools sufficiently
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.