someone can help me, I have a problem with engine V6_3.3_2014_Sorento.

[mrcoco]

I'm trying to adjust the timing, but I finished the scanner gives me fault code P0021. I've already checked everything: new valve control fluid, new camshaft position sensor, new oil (the correct type), I checked the wiring, and everything seems fine., I check the signal:good. What's the problem? I've tried three times, but I can't get it right. I'm puting the cams, chains exactly like manual say me. please let me know if there some trick.