RCU family
RCU_a022_BBstatusCounter
Not Available
What does the RCU_a022_BBstatusCounter alert mean?
Brake Booster (BB) status message counter is incorrect.
What you'll see in your Tesla
- Not Available
What triggers it
BB_status CAN message is received with incorrectly incrementing counter for longer than 100 milliseconds.
When it clears
BB_status Controller Area Network (CAN) message is received with correctly incrementing counter for 100 milliseconds.
Potential impact
There may be an issue with the transmitting Electronic Control Unit (ECU) or 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.