10 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH1128 & 1130 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reported or suspected cause
cracked oil filler neck or loose/failed oil fill cap
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that report identifying a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Reported cause
Another somewhat common culprit is a cracked oil filler neck or loose/failed oil fill cap.
1128 & 1130 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'cracked oil filler neck or loose/failed oil fill cap' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'cracked oil filler neck or loose/failed oil fill cap' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check entire intake' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that report identifying a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Reported cause
When I got those 2 codes it was the tube that connects the top of AOS to the TB.
1128 & 1130 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Clean mass air flow sensor
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
1128 & 1130 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace air filter and cleared the codes
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
After a couple failed attempts at cleaning the MAF, I replaced it, changed the air filter and cleared the codes.
1128 & 1130 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace air oil separator
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
1128 & 1130 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace stripped screw and the vent hose
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Figure I need to pull the intake manifolds off, replace a stripped screw and the vent hose that goes to the AOS (the expensive hose,) and seal it up really well.
1128 & 1130 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Coverage and how to read this overview
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.
10 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T220748Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hey everyone.
I've been doing a lot of research on this, but this is me hoping one of you have an answer for me.
I got a 01 boxster in October, 60k miles but no matter what I do, i can't seem to get rid of this CEL for 1128 and 1130. It has been idling pretty low
What I've tried:
I replaced the AOS,
I've cleaned the MAF.
Got a smoke test (not sure how well he did),
Sprayed carb cleaner on my hoses hoping for an rpm change.
When I reset the code, I seem to gain some power, but the code comes back when I'm at low rpm. (Drops to about 500)
My next step is to buy a new MAF and clean the throttle body.
Am on the right track? I admit it's getting a bit discouraging.
I'm tempted to call a Porsche dealer to see what they charge for diagnostic, but I am afraid it will be a chokingly high price
Thanks in advanced
You're too lean, so there's a good chance you have an air leak (or bad MAF).
Check the entire intake.
Another somewhat common culprit is a cracked oil filler neck or loose/failed oil fill cap.
Could be bad MAF
When I got those 2 codes it was the tube that connects the top of AOS to the TB. The fitting on the TB side was not seating correctly. So vacuum leak was my issue
I had the same codes. After a couple failed attempts at cleaning the MAF, I replaced it, changed the air filter and cleared the codes. The CEL did not return.
I have the same problem. Done the same things. Figure I need to pull the intake manifolds off, replace a stripped screw and the vent hose that goes to the AOS (the expensive hose,) and seal it up really well.
Carb or brake clean won't help you localize any vacuum leaks. Starting fluid will, just use short shots, don't go crazy. or a handheld small unlit propane torch. Either will change the rpms when sucked in thru a leak.
Thanks for the replies everyone. After your comments I decided to one-day ship a new MAF from Amazon. Hopefully it works out okay. If not, I just so happened to purchase starter fluid too. After I clear the codes, it would usually take 2-3 days of driving to work to turn back on.
I will have an update for you then
Update:
A week of driving went by and no CEL.
Performance seems different. Can't tell if I have more or less power to be honest, but it does feel different to drive.
Seems like I have less get-up and go in 1st, but my idle is finally holding steady.
Had a loud screech happen twice on me today, one while slowing down to go over a speedbump. And the second was less agressive while I was at idle in a parking lot. I am crossing my fingers it goes away, or that it's just a loose fan belt. Imagine you will see a forum post from me about that soon.
Thanks again
It
will
go away if your fan belt fails. For sure. In fact, the engine will soon be VERY quiet! Investigate the screech! Cheaper than killing a porsche engine.
Buy a new Bosch or Porsche MAF. Install it & if the car runs better leave it in. If it runs the same take it out & reinstall the old one. Save the new MAF you will need it sometime.
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