24 Monitoring VDD11/VDD25 voltage - Dosing valve/Pump motor - supply voltage VD11 high - P0659 12 Volt supply for dosing module - Above upper limit
Monitoring VDD11 voltage -Dosing valve - supply voltage low - P0658 12 Volt supply for dosing module -below lower limit
If Steering Not Working,Hydraulic suction filter plugged.Improper tire inflation.Steering linkage needs lubrication.Excessive play in steering. See your John Deere Dealer.