IBST family
IBST_a187_brakeBusOff
Not Available
What does the IBST_a187_brakeBusOff alert mean?
The CAN Bus status is monitored cyclically, whenever there is a short circuit between CAN-H and CAN-L or a heavy bus disturbance which leads to BusOff, the fault is registered
What you'll see in your Tesla
- Not Available
What triggers it
ESP is not receiving any message traffic on BRAKE bus
When it clears
Check BRAKE bus for continuity and traffic on bus. Confirm BRAKE bus issues with MIA alerts on other devices. Power cycle.
Potential impact
Vehicle hold and AutoPilot disabled
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
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.