IBST-A117
IBST_a117_supplyOvervoltageLvl2
Also written as IBST_A117 / IBST A117 / IBST_a117_supplyOvervoltageLvl2 / ibst_a117_supplyovervoltagelvl2
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-A117 mean?
Tesla alert code in the Integrated Brake System (IBST) module. The UBB voltage is in overvoltage level2 failure range. System shall be in 'ReducedPerformance' state. The control over MRG via EN_HY or MRAUC or both does not work. 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 in overvoltage level2 failure range. System shall be in 'ReducedPerformance' state. The control over MRG via EN_HY or MRAUC or both does not work. 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: The UBB voltage is in overvoltage level2 failure range. System shall be in 'ReducedPerformance' state. The control over
- 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-A117 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.