Yeah, but how do you know which o2 sensor to change? Are they both the same? I'm getting the same code as you, if you can't tell.

 

Maybe the check engine light is something stupid.
For example, my car has the check engine light on since 3 years ago... And why is that? Because of the alarm system my dad installed.

 

Resetting the ECU is useless in such instances. The ECU will not throw a code if nothing is wrong.

 

Well something is obviously wrong here... Before, my old header had HUGE cracks in it... I could literally see smoge coming from the cracks when I seafoamed the motor (you know it makes the car emissions more extreme), I replaced those and the cel still comes on... Before I could see it being an exhaust leak, but now what? Could that have messed things up? And could the fact that the last owner used the cheapest 87 octane gas, have caused problems??

 

I'm just shooting in the dark here. I'm not sure if the gas really matters or not. Other people should comment on what they think.