Finally got my Lude running but need help

When I put my exhaust manifold on I let the pipe under the engine drop down and forgot about the OX sensor. Well, I pulled the wires out of the socket from it and now I don't know how they go back. I guess but must have guessed wrong because my Check engine light comes on after only a few minutes of driving. I know that the 2 grey wires are grounds and go on the bottom but don't know where to put the other 2 wires. I think one is green and ...hmm maybe brown? I'll check tonight for sure but thought someone might know.
Rob

Shoot...forgot to tell you it is a 90 Si DOHC 2.05 liter.

there are two grounds.
one should be a regulated 5 volts power for the heater and one for the signal wire usaly green on hondas

Thanks for the info. I was going to check that out when I got home last ngiht but the car started making all kinds of noise from the upper end so I took the valve cover off last night and the bolt that holds the sprocket onto the exhaust cam had backed out. I'm just almost positive that I torqued it down when I put it all together but maybe I forgot. Damn...anyway, the bolt was coming out and the timing belt was riding off of the sprocket...I was VERY lucky it didn't come off. I was on the highway and when I got off the highway I could here it ticking or whatever. Anyway, I sure hope that is all that was ticking. I can't see anything else wrong. I left the valve cover off so I can recheck my lifters tonight when I get home. I didn't know how COOL the engine had to be to adjust them.

Thanks for the info. I was going to check that out when I got home last ngiht but the car started making all kinds of noise from the upper end so I took the valve cover off last night and the bolt that holds the sprocket onto the exhaust cam had backed out. I'm just almost positive that I torqued it down when I put it all together but maybe I forgot. Damn...anyway, the bolt was coming out and the timing belt was riding off of the sprocket...I was VERY lucky it didn't come off. I was on the highway and when I got off the highway I could here it ticking or whatever. Anyway, I sure hope that is all that was ticking. I can't see anything else wrong. I left the valve cover off so I can recheck my lifters tonight when I get home. I didn't know how COOL the engine had to be to adjust them.

use some locktite on that bold and you shouldnt have to torque it verry hard

Damn, I already have it all back together now. That is a great idea.
Anyway, it just purrs like a kitten now. It is very quiet and runs perfectly. I'll keep an eye on it and if it starts making any noise at all I'll take it back apart and put the loctite on it for sure. I'm thinking I just overlooked that bolt on torqueing it somehow.
Thanks for everyone's help.