FC family
FC_a160_CA_ss2Deasserted
Unable to DC Fast Charge
What does the FC_a160_CA_ss2Deasserted alert mean?
The vehicle is unable to CHAdeMO DC fast charge because the electric vehicle supply equipment (EVSE) reports that it is not ready to charge.
What you'll see in your Tesla
- Unable to DC Fast Charge
- Contact charging station operator
What triggers it
The EVSE does not assert that it is ready to charge when expected.
When it clears
The EVSE asserts that it is ready, 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.