2015 Subaru WRX - p0021 and p000c

Alright, so short story and new issue.

This thing is slowly burning Oil, like in between oil changes i Have to add oil to it. I could occasionally smell oil burning. In any event a friend told me to try a heavier oil and maybe some engine oil leak sealant. I did that. 5x40 and Lucas engine oil sealant. It felt like it worked?

Fast forward a few months later and an oil change.

Now the car check engine light comes on. codes have been p0011, but now I just get p0021 and p000c. Now before you start telling me what i need to do, lemme tell you what ive done.

-I obviously changed the oil, filter and made sure the level wasn't low.
-The banjo bolts on the top seem not to have screens, so its not that.
-I changed the OCV for bank 2.
-I checked the camshaft solenoid and that seems to be fine as well.

so where do I go from here friends. It also has some idle issues.