1 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCodes 0410 & 1411 fixed, now 0444
Reported or suspected cause
sorted
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
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.
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 · Original poster
So, on my first start with a new check valve, I got no CEL...Also, IIRC, with the bad check, the cold-start air pump will run for a minute or two, go off, and then come on again for a brief time...
Leading evidence: 'sorted' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'sorted' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check the cold-start air pump will' (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 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 · Original poster
I replaced all three valves anyway, while I was in there.
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.
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 · Original poster
I installed/tightened the check valve with channel locks...)
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 · Original poster
I used a 10" pipe wrench to take off the check valve...avoiding having to buy and modify some 27mm claw tool....
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check the cold-start air pump will
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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 · Original poster
So, on my first start with a new check valve, I got no CEL...Also, IIRC, with the bad check, the cold-start air pump will run for a minute or two, go off, and then come on again for a brief time...
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 · Original poster
So, on my first start with a new check valve, I got no CEL...Also, IIRC, with the bad check, the cold-start air pump will run for a minute or two, go off, and then come on again for a brief time...
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.
1 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: 20261026T212127Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi all... 1999 base model was throwing codes 0410 &1411. Search here told me it was the electrically operated vacuum valve, the vacuum operated valve or the check valve.... All inconveniently located behind the alternator... I got all three before tackling the job.... Thanks to the folks here who posted on replacing these parts.... Back in 2009...
The easiest part to test is the check valve, but it's also the hardest to remove. Just blow through it. That's what was wrong with mine at 91K miles... the check valve... I replaced all three valves anyway, while I was in there.
(Here's a hint: one thread says to remove the Throttle Body. I did but found it unnecessary. Just take off the serpentine belt and other stuff to get the alternator out... Turn alternator counter-clockwise and tilt back... You can pull it out far enough to take off the two alt wires, but DO discon the battery, for sure. The three valves are back there and you can get at them... I used a 10" pipe wrench to take off the check valve...avoiding having to buy and modify some 27mm claw tool.... I installed/tightened the check valve with channel locks...)
And, a little more info.... with a bad check valve, you can clear 0410 & 1411 and drive for one day. I even passed Texas emissions that way... But the next day, on a cold start, fault codes and CEL will return...
So, on my first start with a new check valve, I got no CEL...Also, IIRC, with the bad check, the cold-start air pump will run for a minute or two, go off, and then come on again for a brief time... With the new parts the pump only ran once... telling me the problem was sorted... NO????
Finally, HERE IS MY QUESTION....
Next day, second cold start, with the new parts, I get code 0444. not 0410 or 1411....
O444 has something to do tank venting and a purge valve, But I'm asking myself, "Self, what did you not get back on right????"
I also remember telling myself when installing the new parts, "Self, you make damn sure you have all the hoses and connection on right, because you don't wanna have to pull all this crap off again to check them." And, I did, make damn sure everything was right that is...
I cleared 0444 and restarted. No codes, but that's a hot-start... Will I get 0444 on the next cold start?
So, did I do something to trigger 0444 or is it just a coincidence????
One more bit of info... Searching here, I found 0444 may be related to the gas cap or fuel-tank pressure... I took off the gas cap after getting 0444 and pressure was quite high.... Took several seconds for pressure to equalize... Could that be all it was???
I'll know more on the next cold-start, but I'm selling the car (don't want too, but relocating and must).....I won't sell if anything is wrong with car, so I want to make sure if I say it's fixed, It's Fixed...
Any advice, comments appreciated.... Thanks Mark
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