DETAILS, FICTION AND ODB2 CODE P0420

Realizing the will cause on the mistake P0420 code would allow you to to stay away from it in the future. In particular considering how expensive and irresponsible the extensive-term impact would make you seem. Among the following is The main reason why your ECM detects the P0420 code;Can the P0420 code be a result of a defective oxygen sensor? S