17704
P1296
Cooling system malfunction
Doing some googling seems to suggest that this might be something as simple as a faulty coolant temp sensor. I have noticed that from time to time the Temp needle in the cab will show 90 or go abit below 90 while driving, does the sensor control that?
If the temp is dropping below 90 when driving, and back up when stopped in traffic, I'd say your thermostat is shot. I had the same fault but I replaced both just to be sure. The temp sensor isnt that expensive at all, I cant remember the price of the thermostat but it's not overly costly either.
17705
P1297
Connection turbocharger - throttle valve pressure hose
Again, googling seems to suggest this could be the DV, Split in a hose or a dirty Throttle body???
Do you have an after market DV? Some after market DVs can be cleaned, I'd try that, and also clean the TB. Electronic ones are a piece of cake to clean, cable TBs need to be aligned with VAGcom after cleaning. After that it could be an N249 valve or possibly a leak.
16395
P0020
-A- Camshaft Pos. Actuator Circ. Bank 2 Malfunction
Google seems to suggest that this could be something to do with something sticking slightly or timing being slighty out by even as low as 2%? which would make sence due to timing belt recently being done.
I'd say that's your timing that's out.
Also from time to time, my car seems abit jurky but then pick backup and drive as normal.
Try cleaning your Throttle Body and see if that clears up. I was having the same problem with mine a while back. It felt like a different car after I cleaned the TB.