FC family
FC_w166_CA_vehConnUnlocked
Unable to charge with CHAdeMO adapter
What does the FC_w166_CA_vehConnUnlocked alert mean?
The vehicle is unable to CHAdeMO DC fast charge because the fast charge (FC) electronic control unit (ECU) detects that the charge port is unlocked when it is expected to be locked.
What you'll see in your Tesla
- Unable to charge with CHAdeMO adapter
- Unplug adapter from station and retry
What triggers it
The charge port reports an unlocked state when it is expected to be locked.
When it clears
The charge port reports a locked state, or the charge cable is disconnected.
Potential impact
DC fast charging is unavailable.
Affected models
Model S 2012-2020
Model X 2015-2020
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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.