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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Wed, Oct-22-2008, 12:41:54 PM   #21
Satans Idol
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Originally Posted by Deamz View Post
how come when i told my SA bout my code he told me he never heard of that law. and it would cost me 2400 for each cat. Can any one help me out with this problem. i'm socal
http://www.epa.gov/oms/consumer/warr95fs.txt
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Old Wed, Apr-04-2012, 01:08:12 PM   #22
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Default Re: SES Light On -Error Code P0430 - catalyst efficiency low - bank 2 - HELP PLEASE

I'm still trying to track down this question myself:


P0420 just popped up after i did my header/Euro200R install. Based on the fact that all was fine before the install, and the fact that the Euro200R has BRAND new cats in them, is it possible my 02 sensors are failing at 80k miles? Is it purely coincidence that they failed immediately after switching to aftermarket headers?
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Old Fri, Jun-08-2012, 06:15:01 AM   #23
InAM3
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Default Re: SES Light On -Error Code P0430 - catalyst efficiency low - bank 2 - HELP PLEASE

What I don't get is, if the dealer did the emissions recall that effectively turned off the post cat O2 sensors how the hell does the car know there's a catalyst efficiency problem ?

I keep getting this code, sometimes its gone for 3 months sometimes its back in a week or a couple hours. Very aggravating.
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Discussing SES Light On -Error Code P0430 - catalyst efficiency low - bank 2 - HELP PLEASE in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)