IBST-A157
IBST_a157_masterCylPressInvalid
Also written as IBST_A157 / IBST A157 / IBST_a157_masterCylPressInvalid / ibst_a157_mastercylpressinvalid
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-A157 mean?
Tesla alert code in the Integrated Brake System (IBST) module. Scl: ESPiB3_pMC1 Invalid Value DTS off set is too high Confirmed Phase Current 2 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. The measured average coil resistivity is above the max threshold. Linear Position Sensor Channel 1 Sensor internal failure FW set in case of temperature degradation level1 Vpre was externally feed. Possible internal shortcircuit. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit.
Original Description
Scl: ESPiB3_pMC1 Invalid Value DTS off set is too high Confirmed Phase Current 2 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. The measured average coil resistivity is above the max threshold. Linear Position Sensor Channel 1 Sensor internal failure FW set in case of temperature degradation level1 Vpre was externally feed. Possible internal shortcircuit. 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: Scl: ESPiB3_pMC1 Invalid Value DTS off set is too high Confirmed Phase Current 2 out of range low. ECU internal fault, c
- 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-A157 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.