EPASTS family
EPASTS_a156_amIntSerialErrSafetyReset
Not Available
What does the EPASTS_a156_amIntSerialErrSafetyReset alert mean?
This alert is reported when there is a GDU communication failure
What you'll see in your Tesla
- Not Available
What triggers it
EPAS ECU GDU device monitor detected failure (wrong parity bit on serial communication). After consecutives retries and error is still present.
When it clears
Perform EPAS Software update. Replace HW if the alert persists.
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.