UI family
UI_a230_ModemSimCardMismatch
Not Available
What does the UI_a230_ModemSimCardMismatch alert mean?
Correct SIM card is not installed on corresponding 4G or 5G Telematics Control Unit (TCU). 5G SIM card should be installed on 5G TCU only, and vice versa.
What you'll see in your Tesla
- Not Available
What triggers it
The 5G TCU detects a 4G SIM card, or 4G TCU and Iris modems detect a 5G SIM card.
When it clears
The 5G TCU detects a 5G SIM card, or 4G TCU and Iris modems detect a 4G SIM card.
Potential impact
Unavailable 5G functionality on 5G vehicles with 4G SIM card installed. High subscription cost for 5G SIM card on a 4G vehicle.
Affected models
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.