Hi, I am not sure about the codes,but I know you can activate the CEL by fueling with the car engine running.If you did this, try taking the car for a long drive, maybe 30 miles or so on the highway.It has worked for me twice.
Otherwise,please,check the audiworld website here;
AudiWorld Forums: VAG-COM VW/Audi Computer Diagnostics for the codes and what they mean.
All the best.