P1130, P1135. Help please.

[SolaraMan7890]

Hey guys. So my 2000 V6 Solara spit those two codes out. I'm aware that they are A/F codes. The mechanic told me buy something called "CATA Clean" (http://www.systemproducts.com) He said prior to replacing the sensors I should try this because it will very likely clear up the system.

What do you guys think? How do I deal with this problem?

Thanks.

[SolaraMan7890]

Update: I used a $6 injector cleaner and light went away for a few minutes, but then came on again.

[SolaraMan7890]

BUMP. Issue is still not resolved!

[ThurzNite]

02 sensor. I think it's the one by the radiator. I got mine from ebay.
Dr J