Renault Megane 1.6i 16v s3000 catalic kontrol off(Lamda sensor off)

[bavlas]

Hi, Frends!
Renault Megane 2003y 1.6i 16v Siemens s3000,i need t remove second lamda sensor, or control of catalic converter.
Now i have DF110(P0420) dtc.
Meyby somebody can help me?
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Br