Cel code 63 P0138

[donkeykong]

Hi guys just a quick advice...

i get the code 63 p0138 secondary so2 sensor high voltage
i have a decat kpro etc..
can i just disable the sensor, yes or no??

also if i put the the original cat on does it still do it's job for the mot??

is the sensor faulty or just complaining? i got this already 3 time in the last week.

i have done a search guys, but not entirely sure

thks in advance