sls midpipe installed, p0421 cel code

[MSPforMe]

Hi I am kinda new on here,ive been looking at this forumn for a while now and finallly decided to register.. ive owned my msp for about half a year, I just installed a sls catless midpipe and have just thrown the p0421 trouble code. I cannot feel any difference.in my car, it seems to be running fine. I was wondering what has happened to.others after they have installed this midpipe and what did you do about it?

 

[CTt3P5]

Seeing that you removed both cats, that is why you have the code. By chance does the pipe have a bung for an O2 sensor? If so, I'd do the non-fouler trick and you should be good to go.

 

[StealthWyvern]

non-fouler trick... see sig for how-to