Here are some important points if you decide to pull a trailer:
Kia Niro 2017 (DE HEV) Service Manual: Positive Crankcase Ventilation (PCV) Valve Repair procedures
Removal
1.
Disconnect the vapor hose (A).
2.
Remove the PCV valve (B).
Inspection
1.
Insert a thin stick (A) into the PCV valve (B) from the threaded side
to check the plunger movement.
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Kia Niro 2017 (DE HEV) Service Manual: Rear Console Cover Components and components location
Component Location
1. Rear console cover
...