IBST-A033
IBST_a033_ecuWdStartuptestFault
What does IBST-A033 mean?
Tesla alert code in the Integrated Brake System (IBST) module. During failsafe logic test actual and expected WD status of System IC differ. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit. GTM reference frequency error. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit. At least one command number for safe backbone monitoring not scheduled from system asic watchdog. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit.
Original Description
During failsafe logic test actual and expected WD status of System IC differ. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit. GTM reference frequency error. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit. At least one command number for safe backbone monitoring not scheduled from system asic watchdog. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit.
Severity Notes
IBST-A033 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.