IBST-D041
IBST_d041_hswInitPhseUndrvolt
Also written as IBST_D041 / IBST D041 / IBST_d041_hswInitPhseUndrvolt / ibst_d041_hswinitphseundrvolt
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-D041 mean?
Tesla diagnostic code in the Integrated Brake System (IBST) module. The HSW initialization has timed out due to an invalid UBB voltage level. This is either due to insufficient voltage supply on the UBB line or the UBB is too high compared to the UB_ECU voltage.
Original Description
The HSW initialization has timed out due to an invalid UBB voltage level. This is either due to insufficient voltage supply on the UBB line or the UBB is too high compared to the UB_ECU voltage.
Affected Tesla Models
What You May Notice
- Integrated Brake System alert: The HSW initialization has timed out due to an invalid UBB voltage level. This is either due to insufficient voltage sup
- 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-D041 is a diagnostic or informational code in the Integrated Brake System system. Typically no immediate action is required.