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)
Partial frosting and sweating of lines combined with poor cooling, fan belt slipping, loss of refrigerant, restricted or clogged liquid line or expansion valve malfunctioning.