EPASTS family
EPASTS_a049_epmLgFail
Not Available
What does the EPASTS_a049_epmLgFail alert mean?
This alert is reported by the ExternalPowerManager_A8140x (EPM) component in case indicates if the Boost drive
What you'll see in your Tesla
- Not Available
What triggers it
Boost drive is indicated, LG pin does not match the commanded value.
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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