My inside lights around ac knobs and gear shift just went out

Nissan pathfinder 2009 2.5 DI diesel auto 88700km strugle to push on 60 to 80 km especially on up roads! is it gearbox or engine problem?

no specific problems with the Pathfinder at this time this is just a routine 30000 mile service.

When engine reaches temperature idle is a little rough when stopped & in gear rpm pulls down to about 625

locate & replace pcv valve on 2009 nissan pathfinder

has become a constant problem. otherwise runs just fine.