Intake Manifold Temperature Sensor voltage is too low
Front Suspension Lock Valve Stuck on fault (suspension will not lock)
PTO switch interlock - Cab Switch and Fender switch on at the same time.
Intake Manifold Temperature Sensor voltage is too low (engine controller pin A34)
If Steering Not Working,Hydraulic suction filter plugged.Improper tire inflation.Steering linkage needs lubrication.Excessive play in steering. See your John Deere Dealer.