UMC family
UMC_a014_SA_Genealogy
Wall plug adapter error - Charge rate reduced
What does the UMC_a014_SA_Genealogy alert mean?
UMC read smart adapter genealogy data and CRC check failed
What you'll see in your Tesla
- Wall plug adapter error - Charge rate reduced
- Plug adapter fully into Mobile Connector and retry
What triggers it
UMC smart adapter genealogy was read but the data failed an integrity check
When it clears
UMC reads smart adapter genealogy data and integrity check passes
Potential impact
UMC will only report 8 A charge current capability until smart adapter genealogy can be read and passes an integrity check
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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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.