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Old 04-14-2008, 12:57 PM   #1
540i6
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Oxygen sensors

I installed high flow cats on my 98 bmw 540i and i keep getting an engine code from the two oxygen sensors after the cats. I was just wondering if there's any oxygen sensor simulators out there for this make and model that will bypass this code? If so where can i get them? Help is highly appreciated!
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Old 04-14-2008, 03:00 PM   #2
Maxim
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Is there a reason you want to simulate them? It should be cheaper to replace them... what is the exact code you're getting - is it insufficient catalyst efficiency code or broken sensor code?

edit:
If it is efficiency you can start cheap by installing spark plug defoulers as spacers.
http://forum.e46fanatics.com/showthr...ht=o2+defouler

Last edited by Maxim; 04-14-2008 at 03:09 PM.
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Old 04-16-2008, 04:15 PM   #3
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It's an Insufficient catalyst effieciency code.
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Old 04-17-2008, 09:46 AM   #4
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Quote:
Originally Posted by 540i6 View Post
It's an Insufficient catalyst effieciency code.
Yeah, I'd try spark plug defoulers. In US EPA pretty much cracked down on the o2 sim makers (i.e Casper), so they are difficult to find.
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Old 04-17-2008, 10:01 AM   #5
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I'll try it out and hopefully it works. Thanks for the info, you've been very helpful!
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