Sorry for your troubles, have you cleared the codes and if so how long before they return?Have replaced spark plugs, MAF, o2 sensors. Still have all dash lights illuminated with codes p0420 and 0430 I guess running on dead alternator ruined catalytics
Looking for suggestions on aftermarket to get things running right again with no dash lights
Secondary ones won’t affect anyway, there is not sensors after them.Make sure which one or ones are bad if any since there are 4 of them. The 2 primary cats are part of the exhaust manifolds and then the two "muffler" looking type are the secondary ones.