12 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHWho's blown the Air Oil Separator?
Leading reported evidence
Replace appreciably
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed
The Idle changed appreciably with the oil filler cap off.
Leading evidence: 'Replace appreciably' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace appreciably' (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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Suggestion
Pain in the *** to change while doing the clutch but not nearly as bad as a waterpume change or even those pesky spark plug tubes.
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.
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Unsuccessful attempt
The dealer replaced my gas cap in reaction to this code last time in. It did not cure the code from re-occurring though - but it does clear after driving for a couple of days.
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.
Unsuccessful attempt
The dealer replaced my gas cap in reaction to this code last time in. It did not cure the code from re-occurring though - but it does clear after driving for a couple of days.
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.
12 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 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: 20261026T024951Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I've done alot of reading on the AOS failure and here is my particular situation with a few clarifying questions:
Over the past few months I've had intermittent CEL, P0446 I believe "vacuum leak". However, these have gone out on their own. Related?
The other night, after heavy heavy rain, I fired up my car and large amounts of white smoke poured from my exhaust. It idled fine, however when I tried to coax it with some gas it stumbled and sputtered by didn't die. I restarted it a few times, even drove it about 20 feet, to try and burn off what I thought was probably water in the intake.
The question is: for those with AOS issues, none of them mentioned the basic uselessness of their engine to rev. beyond idle. Furthermore, if I was dealing with a severe a.k.a catastrophic failure would the engine even start and idle perfectly the 2-3 times that I did it?
Car's in the shop tomorrow, just want to be on the right page before I get my sentence.
AOS is a good suspect, there are plenty of threads about it... can make the car smoke HUGE white clouds, squeal like a whale, run rough, and other issues.
I replaced mine chasing a problem that turned out to not be the AOS, but I read alot about it. Dont panic till its time to panic...take it in and let them diagnos it. An AOS is cheap but the labor can run from 5-8 hours IIRC Part is $150 ish and some small parts along the way for additional $100 max
P0446 is related to the evap canister (located in the right front wheel well). The dealer replaced my gas cap in reaction to this code last time in. It did not cure the code from re-occurring though - but it does clear after driving for a couple of days.
I am unsure if an AOS failure can trigger P0446.......?
Having a vacuum in the system via faulty AOS could trick the system into thinking the shutoff valve isn't working since it is still reading a pressure difference.
Onefastviking,
you are absolutely killing me! I spit beer at my computer screen I laughed so hard. To funny...
When my AOS let go it smoked like crazy at higher RPMs. The Idle changed appreciably with the oil filler cap off. Pain in the *** to change while doing the clutch but not nearly as bad as a waterpume change or even those pesky spark plug tubes.
Cheers,
Geoff
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