Here is a example, of an attempt; to decipher, a generic OBD II code:
C3064 Meaning :
Problem is controller area network wiring bus and modules.
SAE - Generic
Accelerator Pedal Position (APP) Sensor 1 Performance
BBV Sensor Circuit Low Voltage
As you can see, it can be somewhat unclear; as to the code definition and problem. The definitions, online; indicate, different things, based upon the vehicle manufacture/brand. Looking at the whole list of other generic obd II codes; this seems to apply to those as well.
For correct diagnosis; it would be recommended, to use a VW factory level scan tool, which would give you VW specific factory trouble codes and that way, you could look up their correct meaning, by checking the Ross Tech Wiki. VCDS by Ross Tech or OBDEleven; would be a VW specific scan tool solution or other equivalent "VAG" type scan tool.
For now, you might clear the codes and see what comes back. Keep in mind, trouble codes; build up over time and remain in memory, until they are manually cleared. So, you could have stored codes; which may or may not, relate to your current problem.
Trying to decipher the generic OBD II trouble codes; can be a exercise in frustration and may lead you down, incorrect rabbit holes, just end up wasting your time or lead to added confusion (aka: flying blind).
Invest in a VW scan tool: let us know, what codes you find and if you have any codes come back, after you clear your current codes. If you are going to be doing your own repairs; going forward, the investment in a VW scanner, is pretty much a requirement to be able to correctly diagnose things, do testing, confirm repairs and ultimately, fix your VW.