Oil quality and O2 sensors trigger valve timing issues?

[mgjonesin]

I'm getting a P0014 exhaust camshaft timing over-advanced bank 1.

About 2 months ago I was getting a similar code for the intake variable valve timing, along with a ticking from a cold engine. I attributed it to poor oil quality, though I change the oil as per volvo maint. recommendations. Once I changed the oil and reset the code the problem went away.

Could old O2 sensors be shortening oil life and cause my timing issues? 114000 mi. with original O2 sensors.

[volvodoc]

this is also caused by low oil pressure you probally need to drop the oil pan and replace the oil pick up o rings and replace the exh vvt valve on the head