P0420-CATALYTIC 1/1 EFFICIENCY - My First Code
Well I thought I was going to dodge the bullet on this one but I guess not. I got this code while driving today. My guess is that it's because I dont have a cat onmy Maxxfab Exhaust. Is that what causes this code oris something else causing it. Will I hurt my car if I keep driving it this way? Any help would be great. Don't want to mess up my car.


