p0014 check engine light code

What is your question?

I change my oil light comes off , at about 3500 miles the light comes back on after a longer trip anything over an hour ... driving it in town turning the car on and off a few times the light turns back off .. I have read I may need to change the intake /exhaust solinoids .. my question is i use Mobil 1 5 w 30 synthetic , should i just change my oil every 3500 miles .. have any of you awesome people ran into this problem before? what am i looking at for cost to change these solenoids .. any help would be greatly appreciated

How long has your 2012 Buick LaCrosse had this problem?

few months