IBST-A151
IBST_a151_PSCGearRatioReadFault
Also written as IBST_A151 / IBST A151 / IBST_a151_PSCGearRatioReadFault / ibst_a151_pscgearratioreadfault
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-A151 mean?
Tesla alert code in the Integrated Brake System (IBST) module. The value in the NvM block 'Gear_Ratio' is incorrect or 'empty'. Write the correct value for gear ratio and restart the system.
Original Description
The value in the NvM block 'Gear_Ratio' is incorrect or 'empty'. Write the correct value for gear ratio and restart the system.
Affected Tesla Models
What You May Notice
- Integrated Brake System alert: The value in the NvM block 'Gear_Ratio' is incorrect or 'empty'. Write the correct value for gear ratio and restart 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-A151 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.