IBST-A031
IBST_a031_decoupleBitTestFault
Also written as IBST_A031 / IBST A031 / IBST_a031_decoupleBitTestFault / ibst_a031_decouplebittestfault
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-A031 mean?
Tesla alert code in the Integrated Brake System (IBST) module. Failure in system ASIC: Electric or hyraulic decouple bit not reset automatically. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit. replacement fault for NET undervoltage situation
Original Description
Failure in system ASIC: Electric or hyraulic decouple bit not reset automatically. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit. replacement fault for NET undervoltage situation
Affected Tesla Models
What You May Notice
- Integrated Brake System alert: Failure in system ASIC: Electric or hyraulic decouple bit not reset automatically. ECU internal fault, check wiring to t
- 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-A031 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.