Marelli dtc off

[Make80]

Hey

Can someone give me a hand delete second lambda and dtcs from this.
I would appreciate any help, thanks

[duddy]

Maybe more information? What controller, what car, what engine? what errors does it show?​

[Make80]

Vag Golf 4 1.6 gasoline, iaw4mv

[duddy]

dtp ? p0420 ?