Hi guys I really need your opinion before I send the car to dealer.

I hooked up the Durametric to my 04 CTT and have the following readings:
Camshaft Deviation Angle, Bank 1 -13
Camshaft Deviation Angle, Bank 2 -5
Actual camshaft angel bank1 and bank2 was at -1 to 1 when car idles

and the car has P0016 code from time to time. I read on the forum that the deviation angle should stay in -6 to +6 range.

I replaced the timing chain tensioner today. It however did not change the deviation angles much. it decreased the angles about 1 degree.

then I swapped the camshaft position sensor of bank 1 and 2. It did not change the reading either. That means the sensors are okay.

So now, what am I looking at? replace the timing chain? new intake camshaft? replace the VarioCam?
Please help me with this. I do appreciate that.