OK, I've been at school, and I didn't bring my car, but before i left, the CEL came on. It was saying random cylinder misfire. I didn't have time to fix it, so, now, just this week i used seafoam, since i needed to change my oil.

After I changed my oil, the cel went away for a few minutes, then it popped back on, so i went to get it scanned. Now it said:
P0130
02 Senor
Circuit Malfunction
(Bank 1, Sensor 1)

So does that mean it's a wire on the O2 sensor before the cat on the header? If so, which wire would that be refering to?

bank 1 sensor 1 is the first sensor, the one wire sensor, purple wire, if it's not disconeted, it needs replaced

oh wait, sorry, I have an ecotec. Does that code mean the whole sensor is bad?

check the sensor like sunfirepower97 said. it should be around the exhaust manifold before the cat. if its broken/burnt get it replaced. it'll cost like 25 bucks at autozone, cheap and simple. now if it was your aftercat sensor, bank 1 sensor 2 it'll cost you about 70-80 bucks being it directly from ac delco cause all other brands would more than likely through a CEL light. btw make sure you do get the OEM for the first sensor as well.

yes, and if n e one is wondering, the reason sensor two is more expensive, it's b/c it's heated, thats why its a four wire conctor

im having some o2 sensor problems also on the 2nd sensor im confused
when u buy a replacement does it come with the wiring all the way to the 4in connecter or do u have to cut n crimp wires ect? are they universal or made for our cars. when looking on the autozone website they look universal to me

Do not buy a bosch. It will save you a hell of alot of othe problems

is there a way to run without the cat and secound sensor