7A Coolant control valve mechanically - mechanical defective blocked closed - P20A0 Vent valve (Reductant Purge Control Valve) Open circuit
Coolant control valve mechanically - mechanical defective blocked closed - P20A0 Vent valve (Reductant Purge Control Valve) -open circuit
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.