MyTeslaMate
STO family

STO_a091_currentSenOffsetSec

Not Available

What does the STO_a091_currentSenOffsetSec alert mean?

Steering Torque Overlay (STO) assist halted due to Secondary current sensor startup gains all being invalid.

What you'll see in your Tesla

  • Not Available

What triggers it

Secondary Internal: primary and secondary current sensor offset values in memory are each invalid 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.