Codes: -PO420: Main catalyst system efficiency below threshold (Bank 1) -PO422: Catalyst system efficiency below threshold I don't want to throw money at a mechanic so I am trying to figure this out on my own (Thank you google)! There seems to be so many different options for my CEL at this point. I...

So I don't know much about cars, but I am learning! I noticed that my T6 has two O2 sensors in the front and two on the catalytic converter. My CEL light is on and I am getting a PO420 code (Catalyst system efficiency below threshold (bank 1)) and I want to fix it! Now my main question is.. do I nee...

2002 Volvo S80 T6 CEL is on and I have a code PO422 and PO420 -Catalytic Converter problems I want to see if I can possibly clean it out somehow? Also, is it difficult to remove the cat converter and clean it that way? Maybe throw the whole thing into a bucket and let it soak and get cleaned? I just...

Haha I know it is supposed to tell me what is wrong.. It is a code PO422 and PO420. The mechanic said it is the catalytic converter. In my state we don't have to have a catalytic converter so I am not even going to bother fixing it. The car runs fine.. I just don't enjoy looking at that light. It is...

I took my car to three different mechanics and they say my car is running perfectly.. but for some reason my check engine light is always on! I want to figure out a way to just get rid of it I don't care what I have to do. It is an eye soar for me.. Even if I have to go into the console and scrape t...

I have a 2002 Volvo S80 T6 and the CEL is on. I don't know what I have to do to fix it. I could get a new catalytic converter, but I am hoping something else is throwing the code. I keep hearing all of these different solutions and I am extremely confused. Does anyone have some experience with these...

I have a 2002 Volvo S80 T6 and my check engine light is on. I had the codes checked by four different mechanics and they all said it was a PO422 and a PO420. Basically both are to do with the catalytic converter efficiency. I tried to do the spacer/nonfouler trick to get the CEL off but it didn't wo...

I have a 2002 Volvo S80 T6 and I have been doing some work on it. Now I want to see if my CEL goes away.. but I have to reset my codes! The dealer told me it is $45 to do this.... I thought resetting the codes was easy? Does anyone know how to reset the codes yourself?


Thank you!
Bronson

Wow... nice "spacers". They are the exact same thing as a non fouler with a "honeycomb" top. Nice try...

Do you have a 2002 S80 T6? I checked under the car and there are two sensors near the catalytic converter. There are also two in the engine area. Should I install a non-fouler onto both O2 sensors?

Thanks!
Bronson