Citroen Xsara 1999 O2sensor problem

This car is Citroen Xsara 1999 model. While driving a car on tollway, the problem was occurred suddenly. I searched a lot of internet website which user who has same car but finally could not find good result. I think this problem is O2 sensor problem or such as wiring issue between mater panel. 癒される動画なら下記をクリック！