why do catalytic converters become inefficient or bad?
Do you want to know the answer . . . ?
there is no one answer, by the way
Or are you getting a P0420 and/or P0420 code and you’ve failed your smog inspection?
why do catalytic converters become inefficient or bad?
Do you want to know the answer . . . ?
there is no one answer, by the way
Or are you getting a P0420 and/or P0420 code and you’ve failed your smog inspection?