mazda help needed

[yardman10]

I have a 2001 mazda Milennia S. It is a 2.3 miller cycle supercharged engine. It has a P0421 and P0431 fault code. I took it to the dealer to diagnose. they told me two cats are bad and that they will probably break 02's when they come out so they will needed replaced too. It is hard to believe that two converters are bad at the same time. Also, these cats are part of each exhaust manifold so they are way expensive to replace. Any one have same experience with this? Does anyone have any input. Thanks in advance. Josh

[evan9381]

put aftermarket headers on and be done with it

[yardman10]

dont think they make anything like that for this car and wouldnt my CEL still be on?

[Guest Removed]

those are emissions codes. eliminate the converters and get a o2 sim for the rear one. issue solved

[yardman10]

Where can I get an O2 simulator for this car. I thought about doing this on my GTP but didnt know if there was one made for this vehicle. I wasn't sure if the plug would be different. IF you could steer me in the directiong of a simulator that would be awesome

[Twistedrx7]

Maybe you need to look into getting some new working cats...

 

http://www.nwpimports.com/content/cat-wheels/images/cat-exercise-whee4.jpg

[Farkas]

Cats can go bad at the same time, especially in the winter.. not something I doubt, and I know it can be expensive. Personally would do as already stated.

[FourString]

That will cost you a fortune to have the stealership do that work. Go to a reputable smaller exhaust shop to have that all done. It will be much cheaper.

 

That's my 47 cents.