I used to have test pipes with my Injen TD and then went to HFC to eliminate the rasp.

I recently went to a single HKS and may want to go back to test pipes.

My question is that when i had the test pipes, i couldnt get rid of the O2 code it was throwing on the banks.

anyone know how to fix this? i know there are O2 bypass sensors but my experience with them is that they dont work.

any info will help

THANKS!!!

Disclaimer: I did a search and couldnt come up with any relevant information on how to solve this..

(just incase the fire team shows up)

 

anyone?