Audi A6 EML

[AudiA62.0tdi]

Hi all,
After some help and advice
Have an Audi A6 56 plate 2.0 TDI.
It's got an EML on, started with fault code p2100 now also shows p2102 and p2108.
The car runs slightly rough when cold. And rough when accelerating above 2.5k/3k revs but it's not consistent.
I presume there's not the right fuel air mix, and based on the fault codes this is caused by the throttle body not opening and closing correctly at higher fuel input?

Is this possibly just a sensor issue?
If it's the throttle body is it something that would be improved by taking off and cleaning?
If so is it something that is possible for a novice to do? If so anyone got any got a pointer to a guide for it?.
If it's a replacement any one got suggestions on a good budget third party replacement.

Thanks

[AudiA62.0tdi]

Also
Does the valve need to be calibrated with vagcom ?