My 2012 had that code last year. I checked the oil control valve screens, they were clear. Also changed the oil, still came back. Ended up replacing the oil control valve with a $20 one from Rock Auto, and that fixed it. Over 5k miles ago.
It took me about 1-1/2 hours at the most. Although that will vary greatly based upon mechanical proficiency, etc. I didn't remove the exhaust manifold completely, just removed the bolts enought to move it up enough to access the ocv.Do you have any pictures or advise on it? How long did it take?
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