code p0420

[specevil]

got a CEL and went to vatozone to get it scanned and they pulled up P0420, catalyst system efficiency for bank 1 is below threshold for the engine operating conditions. can any1 turn that into english for me, where i should start looking for the problem.

[Titus]

You need a new . If you have less than 80k miles, Mazda has to replace it for free.

[Tim the Teacher]

I got a new but it came after the divorce. My Miata was replaced by the dealer at 35K.

[specevil]

ok, thats what i was thinking. just the wording of that is gay. and im at 73k :)miles

[Titus]

ok, thats what i was thinking. just the wording of that is gay. and im at 73k :)miles

I believe the warranty on emissions parts is 8 yrs / 80k miles, so as long as your '99 was delivered in '99 and not '98, you are good to go.