So it's been raining non stop here in Dallas for about 2 weeks. I let my brother barrow my car he brings it back and the cel came on. I ran it for codes and it was both rear o2 sensors. I unplugged the mil eliminators and water was inside both of them. My question is, should I just replace both or has something else gone wrong? Should I replace the o2 sensors as well? I was told to test them, but i don't know how to. Any help would be greatly appreciated. And just when I finally had the cel off smh. Car is a 96 gt auto vertical.