We guarantee a quick turnaround that will get your TCU back to pristine condition. Only genuine OEM components are used to make sure that the rebuild will meet and fulfil all original equipment specifications. Short circuit in transmission control unit and/or fuse blown. Complete electronic failure in the gearbox. 005636/P1604 – Internal Control Module: Output Driver IC Error. 16946/P0562/001378 – System Voltage too low. Internal leak: P17BF – Hydraulic pump system overload protection. P189C/006300 – Function Restriction due to Insufficient Pressure Build-Up.