Chevrolet Cruze rough idle, poor performance, multiple DTCs. Watch this before replacing anything!!

After diagnosing this 2016 Chevy Cruze 1.4L ECO TECH with several DTCs, vacuum leak at the valve cover PCV. I find that the repair is more than a simple valve cover PCV. It required the replacement of the intake manifold as well.
DTCs:
p0171 System lean
p0300 multiple random cylinder misfire
p1101 intake airflow performance
p0131 oxygen sensor circuit low
p0106 map sensor performance

• #autos_vehicles
• #ruptured_diaphram
• #pcv_diaphragm
• #chevy_vacuum_leak
• #cruze_vacuum_leak
• #chevy_cruze_running_rough
• #auto_repair
• #auto_diagnostics
• #auto_service