That code pops up quite frequently when people are in France!?
I Have this (cheap) OBD11 The engine light is on and the code is P20EE which I assume is NOX sensor fault. I have had this at least once a year and it has reset after driving around for a few trips. This happened on a long drive in France but disappeared again after a couple of days. Then it...
www.t6forum.com
If you're still with that guy get the code reset for now and monitor. It's more likely a 'software glitch' than anything serious.
Loads of threads on here about it.