RDCM [ Rear Differential Control Module ]

Hello this is Range Rover sport 2014 with Supercharged before the car is good no problem in car customer say's before I washed my car after the fault coming in my car dashboard when I connect the Autel and check the fault the fault is coming in RDCM Rear differential control module P0657-13 Actuator supply voltage A circut/open and also one more code are coming P080A/54 Clutch position is not learned so i'm checking the fuses wiring connectors everything is good but the problem is not going to solved please help me, Thanks