im replacing my 02 sensors on my 98 ssei and i replaced the one behind the c/c but i dont see the other one....can some oone please help me

Its in your engine. Locate your sparkplugs that are closest to the firewall, then look for the exhuast tube manifold, and you will see a little "spark plug" looking thing sticking out. There should be cables attached to it, and its a pain in the butt to get out.

Looks like this...

i got the old one out but now i cant get my nwe one in...i went a bought one of the sockets for it ...but i try putting it in from under the car and cant get it to screw in and try from the top but cant get my hand down there

got it done and dang does she run alot better.....my check engine light is still on tho and the dude at autozone said it was because of my o2 sensors(fixed) and some kin of vaccum leaks...any ideas?

the previous O2 sensor code may still be active in bringing up that light, clear the code and see if it comes back?

ok so i took off my battery terminals to reset my comp and the c/e light went off but i turned the car off then back on and its on again..what can i do or any ideas?

Have AutoZone rescan it and then post the codes here. One of us can point you in the right direction.