TSB 16-0120

Some 2017 Fusion and MKZ vehicles equipped with a 2.0L Gasoline Turbocharged Direct Injection (GTDI) engine and built on or before 31Aug2016 may exhibit an illuminated MIL with DTC P04DB (crankcase ventilation system disconnected) in the powertrain control module (PCM) memory. Follow the Service Procedure steps to correct the condition.