[2one3E90]

I just changed my 02 sensors and yes I will get the code checked. But a Ses light came on and changed bank 1 and 2 02 sensors next to the valve cover. Can they come on if they wearnt tight enough? I hand threaded them with threadlocker and tighten them enough but not forcefully. Can the ses light come on because the new sensors sense a cat going out?

Thanks