FC family
FC_w155_CA_evseToPcbDeltaLo
Charging adapter fault
What does the FC_w155_CA_evseToPcbDeltaLo alert mean?
The vehicle is unable to begin CHAdeMO DC fast charging because the temperature difference (delta) between the electric vehicle supply equipment (EVSE) and the printed circuit board (PCB) is lower than expected.
What you'll see in your Tesla
- Charging adapter fault
- Unplug and retry
What triggers it
The FC ECU detects that the temperature delta between the EVSE and the CHAdeMO PCB is below the alert threshold.
When it clears
The temperature delta between the PCB and the EVSE is within normal bounds.
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.