The front vehicle controller (VCFRONT) has opened the low voltage (LV) power feed circuit (eFuse) to the electromechanical brake booster (iBooster / IBST) controller, interrupting power supply to the iBooster (IBST).
<0.01% (Extremely rare)
None displayed
Brake assist functionality may be limited.
The front vehicle controller (VCFRONT) has opened the low voltage (LV) power feed circuit (eFuse) to the electromechanical brake booster (iBooster / IBST) controller, interrupting power supply to the iBooster (IBST).
VCFRONT detects the eFuse circuit gating low voltage (LV) power feed to iBooster as open (tripped).
VCFRONT no longer detects the eFuse circuit gating low voltage (LV) power feed to iBooster as open (tripped) after a retry or sleep cycle, or the vehicle enters a state where the eFuse is expected to be open (off).
Cybertruck, Model 3 2017-2023, Model 3 2024+, Model S 2021+, Model X 2021+, Model Y, Model Y 2025+
service-fix
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