CEL came back. Possibly same code?

My '99 A4's CEL was on so I had it inspected. I took it to a local shop and they basically told me it was due to the purge valve. They cleared the code and I scheduled an appointment with them for next Monday. So, I'm driving home tonight and the CEL came back on. They did a full service inspection and said everything else checked out great. Could this CEL be the same purge valve code or does it not do the same thing twice?
 
Thanks!

maybe, maybe not.  only reading the code from OBD connector will tell you.

yeah, get to autozone and have them scan it.