MyTeslaMate
EPASTS family

EPASTS_a018_exchCsErrorCheck

Not Available

What does the EPASTS_a018_exchCsErrorCheck alert mean?

This alert is reported by the ExceptionHandler_TC3x (EXCH) component when the CRC mismatch is detected in the non-initialized data

What you'll see in your Tesla

  • Not Available

What triggers it

EPAS application component ExceptionHandler detected memory failure (CRC) at startup.

When it clears

Perform EPAS Software update. If error persists, replace HW.

Potential impact

EPAS full loss of assist.

Affected models

Model Y Model Y 2025+

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.