MyTeslaMate
FC family

FC_a135_CA_vehRxBufOvf

Not Available

What does the FC_a135_CA_vehRxBufOvf alert mean?

The Fast Charge (FC) Electronic Control Unit (ECU) has experienced a bus heavy condition. Messages received by the FC ECU stay in queue or overflow, interrupting communication with the charging session.

What you'll see in your Tesla

  • Not Available

What triggers it

FC ECU detects the queue responsible for receiving messages is full or overflowing.

When it clears

FC ECU no longer detects a full or overflowing queue when receiving messages. Enough space is allocated to receive messages.

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+

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.