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Old 02-27-2016, 01:29 PM   #1
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Air Injection Check Valve

I have a 2001 Porsche Boxster and the CEL is on. I took it to Autozone to get the codes:

P0410 - Secondary Air Injection System, Bank 1
P1411 - Secondary Air Injection System, Bank 2 - Below Limit

It recommends replacing the Air Injection (AIR) Check Valve.

I went to check Ebay for the part and I'm seeing a couple of different things there (part looks different, price varies from $25 to $125, etc). Is anyone familiar with this enough to make a recommendation. Is this an easy fix or should I go to an Indy? I appreciate any advice. Thanks in advance.

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Old 02-27-2016, 04:39 PM   #2
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P0410/1411 Bank 1 & 2 below limit
Possible fault cause
♦ Secondary air injection pump is not triggered
♦ Secondary air injection pump does not work
♦ Air supply lines restricted
♦ Electric change-over valve does not function
♦ Air change-over valve does not function
♦ Vacuum system leaking

Start by looking for a vacuum leak. Any of the small tube off. The large hose from change over valve to pump cracked or off. Bad change over valve (This is under the passenger side intake).
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Old 02-27-2016, 07:17 PM   #3
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Quote:
Originally Posted by jsceash View Post
...
Start by looking for a vacuum leak. Any of the small tube off. The large hose from change over valve to pump cracked or off. Bad change over valve (This is under the passenger side intake).
^ That.
Then if it is a valve, in the Air Injection, it's this:


Not a "check" valve.
Another possibility (rare?) is that the passages at the exhaust manifold are clogged. Jager did a great write-up a while back:
http://986forum.com/forums/general-discussions/49666-p0410-secondary-air-injection-system-cylinders-1-%96-3-a.html
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Old 02-27-2016, 07:48 PM   #4
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You'll need to do a thorough diagnostic of the entire system as the problem can be with almost any of the components. Finding the real fix can be a PITA.

Here is my story of P0410/P1411: http://986forum.com/forums/general-discussions/41855-p0410-p1411-solved.html
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Old 02-28-2016, 04:25 AM   #5
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I had the same issue on my 2003, ended up having to have the whole system replaced due to hoses getting brittle due to age etc, total cost was around $1000 for a main dealer to fix.
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Old 05-20-2018, 12:30 AM   #6
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Here is a really detailed video showing how to diagnose and fix this:
And links to cheap new parts

https://youtu.be/go34DJAuPyg
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Old 05-23-2018, 07:45 AM   #7
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the video is ok, but my experience is to start with inserting a vacuum gauge in the system and see if you have 14-18hg of vacuum. The vacuum canister is glued together and can leak. Canister is only $25 or so.

Replace the rubber vacuum lines with high temp silicon hose. heat and age dries the rubber hoses.

I found the vacuum source connection would not stay in the manifold. I replaced connector with a barbed brass one.
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