I was a dummy and over oiled my K&N air filter. Not only did I forget to let it dry thoroughly, but I oiled both sides. *sigh*. Now the check engine light is on and odb2 scanner says P0420: Catalyst System Efficiency → Below Threshold → Bank 1.
Okay after a well deserved laugh at my expense, would anyone have a practical suggestion to clean or replace my O2 sensor? It’s a 2017 TSI so no MAF sensor on the intake to clean. Would it be worth trying CatClean?
EDIT: The engine feels fine and there’s no hesitation or other symptoms.
Okay after a well deserved laugh at my expense, would anyone have a practical suggestion to clean or replace my O2 sensor? It’s a 2017 TSI so no MAF sensor on the intake to clean. Would it be worth trying CatClean?
EDIT: The engine feels fine and there’s no hesitation or other symptoms.