EPASTS family
EPASTS_a100_amVbrgLssFault
Not Available
What does the EPASTS_a100_amVbrgLssFault alert mean?
This alert is reported by the ActuatorManager_R12 (AM) component when there is a GDU failure. This diagnostic checks if low or high-side VDS references are disconnected.
What you'll see in your Tesla
- Not Available
What triggers it
Low or high-side VDS references are disconnected. EPAS ECU GDU device monitor detected failure (loss of VDS reference).
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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