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p0421 warm up catalyst efficienc below threshold (bank 1)

November 15 2005 at 1:02 AM
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MY CAR WONT PASS THE EMMISIONS BECAUSE OF THIS .... WHAT COULD REALLY BE THE PROBLEM.. I BOUGHT A NEW GAS CAP FOR MY VEHICLE ... BECAUSE THE GAS CAP THAT WAS ORIGINALLY ON MY VEHICLE WASNT THE CAP FOR MY CAR ... I HAVE A 1999 MADZA MILLENIA S .... PLEASE TELL ME SHOULD I HAVE MY CODES CLEAR TO SEE IF THEY COME BACK ON OR WHAT .... WHAT TO DO .. I DONT WANT MY PLATES SUSPENDED BECAUSE OF FAILING TO PASS THE EMMISIONS TEST.. PLZ HELP.


THANKS

 
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AuthorReply

i'm having the same problem

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March 31 2006, 1:29 AM 

hi,

did you ever get your 1999 madza millenia s repaired... i was told my manifold rear converter was bad. and it wont pass the emmisions.. im scared to go to the dealer.. im still looking for shops to get it repaired at a reasonable price... i'll give you more information when you email me back with any information to help. thanks.

thanks
tekella

 
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