EPASTS family
EPASTS_a017_stmdStmPlausibilityCheckErr
Not Available
What does the EPASTS_a017_stmdStmPlausibilityCheckErr alert mean?
This alert is reported by the STMDriver_TC3x (STMD) component when the System timer (STM) plausibility check fails due to an intolerable time difference between the DMA and STM timestamps.
What you'll see in your Tesla
- Not Available
What triggers it
EPAS microcontroller detected out of sync timers (system timer vs DMA) at startup.
When it clears
Perform EPAS ECU power cycle.
Potential impact
EPAS full loss of assist.
Affected models
Model Y
Model Y 2025+
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