TESLA Diagnostic
IBST-D021
IBST_d021_ubbSupplyLine
What does IBST-D021 mean?
Tesla diagnostic code in the Integrated Brake System (IBST) module. The alert sets against the 12V supply, and there is a UBB supply line interruption, which could be caused by a damaged / missing fuse, broken vehicle wire harness, wiring issue, or a deep under-voltage condition.
Original Description
The alert sets against the 12V supply, and there is a UBB supply line interruption, which could be caused by a damaged / missing fuse, broken vehicle wire harness, wiring issue, or a deep under-voltage condition.
Severity Notes
IBST-D021 is a diagnostic or informational code in the Integrated Brake System system. Typically no immediate action is required.
Other IBST Codes
IBST_a001 IBST_a002 IBST_a003 IBST_a004 IBST_a005 IBST_a006 Startup safety test detected a failure of uC safety logic. E... IBST_a007 IBST_a008
View all IBST codes →