MyTeslaMate
STO family

STO_a122_sasAngleCalib

Not Available

What does the STO_a122_sasAngleCalib alert mean?

CAN messages from the steering angle sensor ECU have an invalid calibration value, indicating an error in data integrity has been detected.

What you'll see in your Tesla

  • Not Available

What triggers it

For 1 or more seconds, CAN message frames from the steering angle sensor ECU have an invalid calibration signal value

When it clears

CAN messages received as expected

Potential impact

Active Driver Assist System (ADAS) control is disabled, and Steering assist may be affected, since the steering angle sensor to Steering Torque Overlay (STO) interface is interrupted

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.