if you ever get this code in almost any car and you don't want to spend hundreds of dollars replacing the catalytic converter on your car, chances are you can fix the problem by installing a spark plug fouler under the oxygen sensor on the faulty catalytic converter, the spark plug fouler is always installed on the post catalytic converter oxygen sensor. in this car we got a p0420 code which mean that the faulty catalytic converter is on bank 1 or the cylinder head that has the #1 cylinder.
you can get different types of spark plug foulers at any auto parts store
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