MyTeslaMate
STO family

STO_a079_motPosSenMainSpi

Not Available

What does the STO_a079_motPosSenMainSpi alert mean?

Steering Torque Overlay (STO) assist halted due to Primary motor position sensor communication startup error.

What you'll see in your Tesla

  • Not Available

What triggers it

Primary Internal: motor position sensor communication error 3 or more times on startup

When it clears

System Reset

Potential impact

Steering Assist reduced

Affected models

Semitruck

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.