Oil Jet

WARNING: This page is about a different car, the 2011 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

Check nozzle for deformation and damage.
Blow compressed air from nozzle, and check for clogs.
Using a clean plastic stick, press check valve in oil jet relief valve. Check that valve moves smoothly with proper reaction force.
If it is not satisfied, clean or replace oil jet.