FC family
FC_w156_CA_flybackRunTimeout
Unable to DC Fast Charge
What does the FC_w156_CA_flybackRunTimeout alert mean?
The Fast Charge (FC) Electronic Control Unit (ECU) has detected flyback been running too long and became timeout.
What you'll see in your Tesla
- Unable to DC Fast Charge
- Contact charging station operator
What triggers it
FC ECU detects flyback has been in the drive state for more than 30s.
When it clears
FC ECU set the flyback target mode to OFF.
Potential impact
Charging session may not start or may become interrupted.
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.