I installed the CVFab Catted Downpipes on my '22 ST about 3 months ago, the car is not tuned. it does have the O2 adapters on, I run regular 89 pump gas and this morning I got a check engine light CODE - P0420
I have contacted CVFabrication to see what they think. Anyone on here run into this issue before or have an idea of what I can do?
I have contacted CVFabrication to see what they think. Anyone on here run into this issue before or have an idea of what I can do?
