D dstrong2012kona Member Oct 27, 2025 7 1 13 New york Oct 27, 2025 #1 Oct 27, 2025 #1 Just aquired a 2012 Boss 302 and have a check engine light PO420 code ( catalytic inefficiency ) anyone have any insight experience with this?
Just aquired a 2012 Boss 302 and have a check engine light PO420 code ( catalytic inefficiency ) anyone have any insight experience with this?
Noobz347 Stangnet Facilities Maint Tech... Er... Janitor Admin Dude Jan 4, 1985 42,925 21,100 234 Box behind Walmart Oct 31, 2025 #2 Oct 31, 2025 #2 Duplicate thread