CVFab Catted Downpipes - Check Engine Light

[GeorgeMelmen]

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?

 

[Combatvet]

I have a 2025 and to avoid this potential issue I used these instead of the CVFab extensions. Are you certain they put everything in the right spot? Some have accidentally installed the bungs in the wrong hole.
Vibrant Performance 19019 - Vibrant Performance J-Style Oxygen Sensor Fittings
VPE-19019

 

[GeorgeMelmen]

Thanks for sending this. Yeah I’m not sure they installed it correctly I will double check. Next thing I will look for is any leaks