Audi a3 2.0 tfsi 2010 DE CAT and MAP

[0207tipz]

Hi all
Recently I did an DE CAT eml light came up checked VCDS says O2 sensor fault been advised to map it out so remapped car to stage 2 and they did a O2 patch EML light went but end of day the eml light came back on same fault code O2 sensor they mapped it out again but end of day eml light comes back on for o2 sensor.
Any advice????

 

[NHN]

Get a refund on your mapping & get a better tuner to resolve it.

 

[0207tipz]

Get a refund on your mapping & get a better tuner to resolve it.

Hi
The EML turned out to be evap issues p0441 cleared it but after few days it comes back on the thing is ive changed n80 7 months ago with original audi part going to be changing charcoal canister tommorow i have no power loss car is responsive do you know what else can cause this problem or what can be checked.