MyTeslaMate
STO family

STO_a133_can2BusOff

Not Available

What does the STO_a133_can2BusOff alert mean?

Steering Torque Overlay (STO) CAN 2 bus messages are not transmitting properly, meaning bus off detected.

What you'll see in your Tesla

  • Not Available

What triggers it

Internal: CAN 2 bus transmission error counter is more than 256

When it clears

CAN messages received as expected

Potential impact

Active Driver Assist System (ADAS) control is disabled, and Steering assist may be affected

Affected models

Semitruck

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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.