S2000 Under The Hood S2000 Technical and Mechanical discussions.

CEL code PO411

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Old Jul 6, 2005 | 11:56 AM
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Default CEL code PO411

I'm geussing this may be caused by a bad intake sensor or mabe a bad TB sensor, just wondering what you guys think.

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Old Jul 6, 2005 | 12:24 PM
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Nah. My guess is that you've recently added some type of intake system and routed a vacuum line incorrectly....or possibly some other mod incorrectly. Think so? If you think you've done it correctly, either pull the back-up fuse for a couple of minutes, or disconnect the battery for a few minutes and then retry. If you get the CEL again, you've got an issue to track down.
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Old Jul 6, 2005 | 12:27 PM
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Well, its a stock motor but was swapped in since my original motor was stolen. So that, and a number of other things can be the culprit. Damn cels are headaches. Thanks though!
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Old Jul 6, 2005 | 12:38 PM
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I smell a big rotten tuna here!!
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Old Jul 6, 2005 | 01:39 PM
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P0411=Secondary Air Injection System Incorrect Flow Detected

Your vacuum hoses are incorrect or your check valve is facing the wrong direction.
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Old Jul 6, 2005 | 03:04 PM
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Look here: https://www.s2ki.com/forums/index.php?showtopic=105368

For correct Vacuum line routing.
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Old Jul 6, 2005 | 04:11 PM
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Thank you much! I'll try this out and hopefully it works.
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Old Jul 6, 2005 | 04:42 PM
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Wow, my vacumm tubes were really messed up. I rearranged as they were in the tutorial and reset the ecu so far its good.

Thanks again, you kick ass.

edit Also is any serious damage possible from this? I've been driver her around while the hoses were messed up for a couple hndred miles.
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Old Jul 6, 2005 | 05:02 PM
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Originally Posted by t.vo408,Jul 6 2005, 04:42 PM
edit Also is any serious damage possible from this? I've been driver her around while the hoses were messed up for a couple hndred miles.
No serious damage... just possibly some bad emissions....
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