EPASTS family
EPASTS_a188_epmCommBufferOverflow
Not Available
What does the EPASTS_a188_epmCommBufferOverflow alert mean?
This alert is reported by the ExternalPowerManager_A8140x (EPM) component in case SBC Communication buffer overflow checker. Against systematic SW failures on ExternalPowerManager component.
What you'll see in your Tesla
- Not Available
What triggers it
SBC Communication buffer overflows (RTE buffer (message queue) overflow in the ExternalPowerManager_A8140x component).
When it clears
EPAS will perform a power cycle. If persist then perform EPAS Software update.
Potential impact
EPAS reset. If reset more than 5 times then EPAS full loss of assist.
Affected models
Model Y
Model Y 2025+
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