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
If Inadequate air flow is problematic, so clogged air filters, evaporator core air flow restricted, faulty blower fan motors, defective blower switch or faulty wiring or loose connections.