Hyundai Elantra: Underdrive 
Brake Control Solenoid Valve(UD/B_VFS). Repair procedures - Automatic Transaxle Control System - Automatic Transaxle System - Hyundai Elantra MD 2010-2015 Service manualHyundai Elantra: Underdrive Brake Control Solenoid Valve(UD/B_VFS). Repair procedures