EBAY has cheap cats!
get one from either RPM,Full line Exhaust,Georgia reman Cats, or dealer!
Do not get a cheap one! you will be buying another soon again if you do!
Po420 is NOT a O2 sensor!
Who ever tells you this again! Is a dumbass and don't ever take advice from a dumbass!
Ask your parents they will agree with me! DUmbass Advice will only get you into trouble and dont fix anything!
PO420 is your CAT , an cat only!
my 98 accord was throwing a p0420. I replace the secondary sensor with a new one = no more cel.Originally Posted by Tech5
P0420 meas that the secondary sensor thinks the cat is bad.
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