How to get fix an O2 sensor CEL?

[EJackBauer8]

I was driving fine on Sunday and my CEL light up I stopped right away at the nearest autozone, and the guy said it was an o2 sensor. He said to get a fuel cleaner to fix it. What do you guys think will fix it?
I drive a 99 civic ex coupe no mods performance wise and I use regular fuel.

 

[takeachance]

what was the exact code and which bank is it front or back

 

[EJackBauer8]

Anyone have a list of codes if I could see all of them I'd probably be able to recognize it, I think it was P104 maybe. And honestly Idk where it was.

 

[Zedicous]

P0104 is MAF or VAF A Circuit Intermittent

 

[EJackBauer8]

P0104 is MAF or VAF A Circuit Intermittent

Then it's not that one I saw the screen when the guy did it, it said o2 sensor but I didn't ask for the code nor did he give it to me.

 

[Zedicous]

They should of told you, ask someone else and have a pen handy. If you were closer i'd tell you myself, i have a couple scanners.

 

[EJackBauer8]

The code number Is P0131 air fuel ratio sensor 1 bank 1 sensor low

 

[greenEJ6]

thats a cheap step to see if you just have a clogged feul injector if that doesnt fix it you will need the bank one o2 sensor

 

[EJackBauer8]

The cel went away by itself, and mpgs are better now.