FC family
FC_a158_CA_evseOverCurrent
Unable to DC Fast Charge
What does the FC_a158_CA_evseOverCurrent alert mean?
The vehicle is unable to CHAdeMO DC fast charge (FC) because the FC electronic control unit (ECU) detects an overcurrent event from the electric vehicle supply equipment (EVSE).
What you'll see in your Tesla
- Unable to DC Fast Charge
- Contact charging station operator
What triggers it
The FCU ECU detects that the EVSE's reported current is above the alert threshold.
When it clears
The FCU ECU detects that the EVSE's reported current is within expected bounds, 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+
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.