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Old Dec 5, 2009, 10:14 AM   #1
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Solutions for eliminating P0420 with AMS O2 spacer on?

I still got P0420 code even I have AMS O2 spacer in my test pipe. I am wondering any solution for this? Thanks!
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Old Dec 5, 2009, 02:05 PM   #2
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not much you can do. Some cars the spacers work and in others they don't. Cobb AP can remove the cel and OS will be able to eventually
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Old Jan 6, 2010, 01:02 PM   #3
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Bump...Just got this code with the same set up.
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Old Jan 20, 2010, 10:48 PM   #4
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i'm also having this problem every other few days, the CEL P0420 will jst pop out . any way to disable it ? maybe tephra can chime in
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Old Jan 21, 2010, 07:43 PM   #5
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What kind of tp are all of you running? I have never had a cel with my current setup. before or after having my car tuned.
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i don't have a tune yet, would a passport do the job?
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Old Jan 23, 2010, 09:22 AM   #6
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not much you can do. Some cars the spacers work and in others they don't. Cobb AP can remove the cel and OS will be able to eventually
Well then why didn't you guys remove it when you tuned my car.

I'll be happy to come back to LA and have you remove it if it can be done.
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Old Jan 23, 2010, 10:15 AM   #7
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Well then why didn't you guys remove it when you tuned my car.

I'll be happy to come back to LA and have you remove it if it can be done.
Do you have AP? Give us a pm
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Old Jan 23, 2010, 11:43 AM   #8
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no AP, ecuflash can ?
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Old Jan 23, 2010, 03:34 PM   #9
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i've tried pretty much everthing in the book to get rid of this with OS. no go. mine is either that code which means reading below thresh hold or the not dectecting it at all code. i came to the conclusion that since i'm running e85 i will see lower emissions no mater what so there is nothing i can do to "pollute" my air so it will read above the thresh hold
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Old Jan 23, 2010, 03:49 PM   #10
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no AP, ecuflash can ?
Currently, I don't believe it can.
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Old Jan 23, 2010, 04:44 PM   #11
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Try putting a bit of steel wool within the spacer. It's a delicate balance to get just the right amount of exhaust hitting the sensor, but this has been effective in many cases!

You need to block a bit more from hitting the sensor, so a bit of steel wool should do the trick.
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Old Jan 24, 2010, 11:39 AM   #12
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Try putting a bit of steel wool within the spacer. It's a delicate balance to get just the right amount of exhaust hitting the sensor, but this has been effective in many cases!

You need to block a bit more from hitting the sensor, so a bit of steel wool should do the trick.
yeah i bet that would work for pump gas vehicles. in my case with e85, it makes it worse actually
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Old Jan 24, 2010, 11:54 AM   #13
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^ Well, stay tuned (ha) for engine management methods then. There will be something out eventually
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Old Jan 25, 2010, 10:47 PM   #14
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all test pipes give this issue?
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Old Jan 26, 2010, 08:38 AM   #15
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I don't think so. I have a TurboXS full turbo back with test pipe. I initially threw the code, but then it went off. I'm on my 3rd tank and still no light or code. I'm on the stock tune.
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Old Jan 26, 2010, 08:38 AM
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02, 2008, ams, code, evo, evo8, evolutionm, fix, lancer, o2, p0420, po420, removal, spacer, spacers, trick, x

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