EPASTP family
EPASTP_a055_amExtendedGduTest
Not Available
What does the EPASTP_a055_amExtendedGduTest alert mean?
This alert is reported by the ActuatorManager_R12 (AM) component when there is a GDU failure. This diagnostic tests the primary GDU safety monitors to avoid the existence of latent failures.
What you'll see in your Tesla
- Not Available
What triggers it
EPAS uC memory read access failed (FLASH).
When it clears
EPAS HW failure. EPAS power cycle N times and if persists, the gear needs to be changed.
Potential impact
EPAS full loss of assist.
Affected models
Model Y
Model Y 2025+
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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.