A1 CAN receive frame E2SCR (Dosing,Exh gas flow,Exh gas temp,Error Supression, Heater, Long Term failure) - timeout - P0600 Serial Communication Link - TIMEOUT
If Steering Not Working,Hydraulic suction filter plugged.Improper tire inflation.Steering linkage needs lubrication.Excessive play in steering. See your John Deere Dealer.