FC family
FC_a138_CA_hwProxTrip
Charging adapter fault
What does the FC_a138_CA_hwProxTrip alert mean?
The vehicle is unable to CHAdeMO DC fast charge (FC) because the FC electronic control unit (ECU) detects proximity voltage indicating that the charge cable is not connected.
What you'll see in your Tesla
- Charging adapter fault
- Unplug and retry
What triggers it
The FC ECU detects proximity voltage indicating that a charge cable is not fully connected.
When it clears
The FC ECU detects proximity voltage indicating that a charge cable is connected, or the charge cable is disconnected.
Potential impact
DC fast charging is unavailable.
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.