FC family
FC_a156_CA_flybackRunTimeout
Unable to DC Fast Charge
What does the FC_a156_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
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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