UMC family
UMC_a003_GFCISelfTestFault
Unable to charge - Mobile Connector error
What does the UMC_a003_GFCISelfTestFault alert mean?
UMC GFCI self test failed
What you'll see in your Tesla
- Unable to charge - Mobile Connector error
- Unplug from wall outlet and retry
What triggers it
GFCI self test failed
When it clears
GFCI self test passes after test is re-run after 15 minutes (non-EU) or cable cycle
Potential impact
UMC will not charge until the self test passes. UMC will retest automatically after 15 minutes (except EU smart adapters) or charge cable cycle
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.