Audi A2 1.4i Lambda + DTC OFF

[neemo1]

Hello!
I need help in turning off the lambda sensor and errors related to it:
AUDI A2 2002y 1.4i
MAGNETI MARELLI
036 906 034Q
IAW4LV.Z
DTC:16804(P0420), 17589(P1181), 17604(P1196), 17586(P1178)

Thanks for help!

[neemo1]

No one have any idea?