IBST-A033
IBST_a033_ecuWdStartuptestFault
Also written as IBST_A033 / IBST A033 / IBST_a033_ecuWdStartuptestFault / ibst_a033_ecuwdstartuptestfault
Why does the exact Tesla alert ID matter?
Record the exact alert ID, including underscores, suffixes, and companion alerts. Tesla alerts that look similar can point to different modules, timestamps, and service procedures.
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.
Affected Tesla Models
What You May Notice
- Integrated Brake System alert: During failsafe logic test actual and expected WD status of System IC differ. ECU internal fault, check wiring to the un
- No noticeable change in braking performance under normal driving
How to Diagnose and Resolve
- 1 Reboot the vehicle
- 2 Monitor over the next few drives
- 3 Schedule service if the alert reappears
Severity Notes
IBST-A033 is an Alert in the Integrated Brake System system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.