Originally Posted by stereo
P0420 is catalyst effency below threshold just means the cat doesn't meet ULEV standards but will pass a normal test I've seen many people just reset the computer drive it down to the smog shop warmed up pass the test then drive home and have the light come back on the next day as it needs 2 complete ideal drive cycles to come back on . glad honda did a good will reimburstment . the next time you get that code just use the fouler trick -works like a charm
Yep. I did that for last year's inspection but this year I just bought a Honda factory cat ($202 on ebay) because I'm sick of getting the 'rotten egg' smell every time I go up a hill and my MPG hasn't been better than 27 on the highway since i started getting PO420...I used to get 29-30 all day long.