Check Engine Light: O2 sensor code

[darkknight]

I have a 3" catless exhaust and the check engine is always on saying that I have a bad O2 sensor. I checked the O2 sensor out and it was all good. I have been told that because I didn't have a cat that the computer thinks that the sensor is bad. Is there any way to fix the light? Anything I could maybe connect to the sensor?

 

[02 WRX Chris]

Yea, get a spark plug fouler and that will trick the sensor and the light will magically turn off! I have yet to do this with my car but my CEL goes off cause I got an awesome aftermarket computer! This is the easiest trick to get it to turn off.