Hello to all.
I am new at this, but I was hoping to get some good help with getting this stupid code off my dash. So, I have been getting this PO420 code for a few weeks now. First, I got a friend to just go ahead and reset the system to turn the light off, then it came back on a few weeks later. I have now gone the cheap route, or so I'm told, and went to purchase a new O2 sensor first before I went into thinking it was my catalytic converter. So, now that the sensor has been replaced the light went off for about 6 days. Now, the light it back on, I have gotten the engine read again and it is saying the same thing, that my catalyst efficiency is low. Well, I called a dealer today, and got some horrendous news on the price of a new catalytic converter plus labor....it was goddamn ridiculous. But anyways, I was wondering if anyone knew the exact part number or anywhere else to find the part so I can get someone to fix it for a lot less money. Also, I have been reading about this code for the last hour or so online, and it seems as though a lot of people have had problems with their subie's having this code go off and it not going away even after replacing the catalytic converter. PLEASE HELP ME!!! I AM SOOO CONFUSED!