RCU family
RCU_a017_chassisBusOff
Not Available
What does the RCU_a017_chassisBusOff alert mean?
The Redundant Control Unit (RCU) has detected no traffic on the CHASSIS Controller Area Network (CAN) bus.
What you'll see in your Tesla
- Not Available
What triggers it
The RCU has not received any messages on the CHASSIS CAN bus.
When it clears
The RCU has begun receiving messages on the CHASSIS CAN bus again.
Potential impact
There may be an issue with the CHASSIS CAN bus.
Affected models
Model Y 2025+
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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.