IBST-A028
IBST_a028_ecuBistFaultCtrFault
Also written as IBST_A028 / IBST A028 / IBST_a028_ecuBistFaultCtrFault / ibst_a028_ecubistfaultctrfault
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-A028 mean?
Tesla alert code in the Integrated Brake System (IBST) module. BIST didn't switch off electrically after too much received wrong BIST commands. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit. Phase Current 1 out of range low. ECU internal fault, check wiring to the unit and or re-flash. If problem continures after several power cycles, reolace unit. Voltage monitor of microcontroller has detected a failure of the microcontroller supply voltage. ECU internal fault, check wiring to the unit and/or re-flash. If problem continues after several power cycles, replace unit. EPBL_systemStatus message not received or corrupt
Original Description
BIST didn't switch off electrically after too much received wrong BIST commands. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit. Phase Current 1 out of range low. ECU internal fault, check wiring to the unit and or re-flash. If problem continures after several power cycles, reolace unit. Voltage monitor of microcontroller has detected a failure of the microcontroller supply voltage. ECU internal fault, check wiring to the unit and/or re-flash. If problem continues after several power cycles, replace unit. EPBL_systemStatus message not received or corrupt
Affected Tesla Models
What You May Notice
- Integrated Brake System alert: BIST didn't switch off electrically after too much received wrong BIST commands. ECU internal fault, check wiring to the
- 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-A028 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.