Re: P0420 Trouble Code - HELP! (Pucks850T)
I just switched out my CAT for a racepipe. I used an O2 spacer but still got this code. Basically the code is telling you that the CAT isn't working properly. If you have a CAT with a lot of miles it is probably bad. If you are running a custom exhaust like I am you may just need an different O2 spacer to fool the sensor.
I just switched out my CAT for a racepipe. I used an O2 spacer but still got this code. Basically the code is telling you that the CAT isn't working properly. If you have a CAT with a lot of miles it is probably bad. If you are running a custom exhaust like I am you may just need an different O2 spacer to fool the sensor.
