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YOUR RESEARCHI love Porsche Maintenance/Codes - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Suggestion · Original poster
I also checked the codes again after the swap to see if anything new had popped up.
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Leading evidence: 'Check codes' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check codes' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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Check codes

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Suggestion · Original poster
I also checked the codes again after the swap to see if anything new had popped up.
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I love Porsche Maintenance/Codes - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

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POST 1 / ORIGINAL POSTEROriginal post

So, I recently swapped out my spark plugs, due to a code I had read a month ago that was a GENERAL MISFIRE. Swapped 'em out and found some oil in half the cylinders' spark plug chambers. Awesome, time for new valve seals, I'm presuming. I also checked the codes again after the swap to see if anything new had popped up. Of course, new codes galore. Any thoughts on what to do about these, and if I'm correct about my above conclusion? Thanks! P0410 Sec. Air inj. Syst P1128 02s range 2 cyl 1-3 P1411 Sec air in sys. Cyl 4-6 P1130 02s range 2 cyl 4-6

POST 2Original post

would point to something upstream and/or common. So lets start with the AOS as a theory and take the air intake tube off and peer into the throttle body. If there is oil there, then it may be from a broken air oil separation tank or the hoses that connect it to the crankcase and the intake. And it may be overwhelming the OS sensors as it isn't burned in the cylinders and escapes to cover the sensors. Link to a web page which describes accessing the throttle body AOS Air Intake info

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