MyTeslaMate
HVP family

HVP_w040_FcContactorFellOpen

Not Available

What does the HVP_w040_FcContactorFellOpen alert mean?

The High Voltage Processor (HVP) has detected a Fast Charge (FC) contactor has opened during a closed state.

What you'll see in your Tesla

  • Not Available

What triggers it

The HVP has detected a voltage drop across the FC contactor, low contactor coil FC current, and the auxiliary switch is open. This indicates a FC contactor has opened despite being in a closed state.

When it clears

The HVP detects the FC contactor state as open.

Potential impact

The FC contactors will open. The vehicle may not be able to DC charge. The current charging session may be unexpectedly terminated as the FC contactors open.

Affected models

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.