The other night my check engine came on again. I had the code read and found out it was a P0420 or "Catalyst System Efficiency Below Threshold (Bank 1)". I was wondering if anyone has an idea of what might be wrong. The car is running perfectly. The only thing I did to it recently was put some...
I just got my 99 prelude about three weeks ago.
it's red with the leather package
114,xxx miles and nothing mechanically wrong
everything is completely stock
i got it through a trade in for my old VW Jetta so it was a hell of a deal if you ask me
but anyways about a week after I had gotten it...