EPASTS family
EPASTS_a035_sbchChipIdFail
Not Available
What does the EPASTS_a035_sbchChipIdFail alert mean?
This alert is reported by the SystemBasisChipHAL_A8140x (SBCH) component when ChipId check is failed - It is SPI-communication related problem.
What you'll see in your Tesla
- Not Available
What triggers it
EPAS ECU SBC device monitor reports failure (chip ID, SPI communication) at runtime.
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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