Hey gang,

I searched and found a couple good threads on owners dealing with the P0420 MIC. Most of what I found was people using spacers etc. on cars with test pipes and no cats.

I have an AMS Turbo Back with and HFC. I seem to be throwing the code more regularly.

I'm going to go out and do a visual check, but while I'm out there maybe someone can chime in with their expeirence. My guess is the O2 sensor needs replacement.

Thanks in advance for your imput!

 

You will trigger this code with a High Flow cat as well. Either disable the code in the ECU or do the mechanical/Spacer trick