I put a catless downpipe on almost two weeks ago and my check engine light still hasn't come on. I just went for inspection right before i installed the pipe and my car passed so there is no way it is turned off by my tuner. WTF??

ANYONE????

 

you dont want it on, why worry?

 

did you ever get hp tuned????

 

you lucky SOB. stop complaining.

 

Im tuned but i had my stock downipe on as of two weeks ago. I 've been tuned a couple of times but never had to turn off that sensor. Plus i just passed inspection so it definately works otherwise it would have shown the o2 sensor as not being ready. Weird

 

so no tuner deleted the p0420 code? i think they did.