IBST family
IBST_a155_supplyUndervoltageLvl1
Not Available
What does the IBST_a155_supplyUndervoltageLvl1 alert mean?
iBooster (IBST) detected UBB voltage is in undervoltage level 1 failure range. System shall be in 'ReducedPerformance' state.
What you'll see in your Tesla
- Not Available
What triggers it
IBST detected UBB voltage is in undervoltage level 1 failure range. System shall be in 'ReducedPerformance' state.
When it clears
iBooster can not recover from this condition. iBooster replacement may be required.
Potential impact
IBST may not operate as expected.
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.