MyTeslaMate
STO family

STO_a063_currentMainEstError

Not Available

What does the STO_a063_currentMainEstError alert mean?

Steering Torque Overlay (STO) assist halted due to Primary current estimate failure.

What you'll see in your Tesla

  • Not Available

What triggers it

Primary Internal: current estimate is inaccurate (by 20 or more Amps) for 50ms

When it clears

System Reset

Potential impact

Steering Assist reduced

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.