7A Coolant control valve mechanically - mechanical defective blocked open - P20A3 Vent valve (Reductant Purge Control Valve) Short circuit high
Coolant control valve mechanically - mechanical defective blocked open - P20A3 Vent valve (Reductant Purge Control Valve) -short circuit high
If Steering Not Working,Hydraulic suction filter plugged.Improper tire inflation.Steering linkage needs lubrication.Excessive play in steering. See your John Deere Dealer.