IBST-A039
IBST_a039_GTMRefFrequencyError
Also written as IBST_A039 / IBST A039 / IBST_a039_GTMRefFrequencyError / ibst_a039_gtmreffrequencyerror
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-A039 mean?
Tesla alert code in the Integrated Brake System (IBST) module. Task scheme error detected (e.g. task not activated in expected time frame task not activated at all). ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit. Internal Control Module Random Access Memory (RAM) Error. ECU internal fault, check wiring to the unit and/or re-flash. If problem continues after several power cycles, replace unit.
Original Description
Task scheme error detected (e.g. task not activated in expected time frame task not activated at all). ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit. Internal Control Module Random Access Memory (RAM) Error. ECU internal fault, check wiring to the unit and/or re-flash. If problem continues after several power cycles, replace unit.
Affected Tesla Models
What You May Notice
- Integrated Brake System alert: Task scheme error detected (e.g. task not activated in expected time frame task not activated at all). ECU internal faul
- 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-A039 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.