IBST-A086
IBST_a086_supplyOvervoltageLvl3
What does IBST-A086 mean?
Tesla alert code in the Integrated Brake System (IBST) module. The UBB voltage is above shutdown threshold(overvoltage level3). Contrary to spec BIST state machine of system IC is started by a wrong BIST command. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit. ADC Pin Test detects open ADC pin. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit.
Original Description
The UBB voltage is above shutdown threshold(overvoltage level3). Contrary to spec BIST state machine of system IC is started by a wrong BIST command. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit. ADC Pin Test detects open ADC pin. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit.
Severity Notes
IBST-A086 is an Alert in the Integrated Brake System system. It is generally safe to continue driving, but have it checked at your next scheduled service.