MyTeslaMate
HVLINK family

HVLINK_a022_PosJbLidSwitchUnknown

High voltage system error detected

What does the HVLINK_a022_PosJbLidSwitchUnknown alert mean?

The positive (left) junction box lid switch is reporting as unknown, breaking High Voltage DC Link Controller (HVLINK) High Voltage Interlock Loop (HVIL).

What you'll see in your Tesla

  • High voltage system error detected
  • Vehicle may not restart - Service is required

What triggers it

Positive (left) junction box lid switch reported as unknown.

When it clears

The positive (left) junction box lid switch is closed or open.

Potential impact

DC Link may discharge or fail to energize.

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.