hey just wondering i received a cel when my test pipe was put in a while ago

now yesterday i removed my testpipe and put my old cat back on. question is will the cel go away by itself or is there something i need to reset or something? i havent checked today but after the cat was back on it stayed on

 

It should go away, you just need to drive the car for a while. You could also disconnect the battery, which will remove the cel, and it should stay off.

 

MAKE SURE YOU HAVE THE RADIO CODE!!!!!!!!!!!!!!!!

 

thanks radio code? i have an aftermarket radio and everytime i take out the battery it nevers asks for one. THANKS i dont feel like removing the battery then i have to reset everything. illjust let it go away on its on. I figured thats what i needed to do i was just impatient