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Exhaust Leak

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16 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHExhaust Leak

Reported or suspected cause

gas cap

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.

Reported cause

I went through this too, it was the gas cap.

Exhaust Leak
Frequently discussed work

Check engine getting exhaust leak code

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 · Original poster

I have a 2000 996 C4 with a check engine getting exhaust leak code.

Exhaust Leak
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Leading evidence: 'gas cap' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'gas cap' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check engine getting exhaust leak code' (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.

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1 matching discussions · 16 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Check engine getting exhaust leak code

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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 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

I have a 2000 996 C4 with a check engine getting exhaust leak code.

Exhaust Leak

Check gas cap

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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 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

Check your gas cap.

Exhaust Leak
Frequently discussed actions (2)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check engine getting exhaust leak code

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

I have a 2000 996 C4 with a check engine getting exhaust leak code.

Exhaust Leak

Check gas cap

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

Check your gas cap.

Exhaust Leak
Reported and suspected causes (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

gas cap

No successful repair reported for this finding.

1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
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

I went through this too, it was the gas cap.

Exhaust Leak
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.

16 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: 20261026T165820Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi All, Does anyone have experience with an exhaust Leak code on their OBD reader? I have a 2000 996 C4 with a check engine getting exhaust leak code. Is a leak something an amateur could diagnose and find the location of? Or best to go to a good mechanic? Thanks!

POST 2Original post

Its very very likely between the head and the O2 sensor.. I think there are 2 junctions on each side before the O2, the head to the header and the header to the crossover pipe. soeither exhaust manifold gasket or the joint from the header to the crossover pipe.. Or a crack in the exhaust tubing... One of those sad, either easy as heck or oh my god jobs..

POST 3Original post

Which code are you getting? You cant hear any signs of a leak while it's running?

POST 4Original post

This is a second-hand suggestion, but ... I have a friend who swears by his electronic gas leak detector, which he bought online for around $35. He's demonstrated this to me and it seems absurdly sensitive. I suspect this could be a good way to pinpoint exhaust or AC system leaks.

POST 5 / ORIGINAL POSTEROriginal post

Thanks all for the suggestions. I will read the code today and post.

POST 6Original post

Quotes source post: 16019478

I can hear the slightest exhaust leak. The gaskets (head to header or header to cat pipe) probably need replacing. Make sure everything is torqued (17#) to spec.

POST 7 / ORIGINAL POSTEROriginal post

Codes read as P0442 - EVAP System Leak Detected (small leak)

POST 9 / ORIGINAL POSTEROriginal post

After spending some time with it (which I should have done before posting admittedly) I now have realized this too. Unfortunately, this is a persistent issue not affected by my gas cap being taken off and then put back on correctly. Also, it comes back once codes are reset. Any thoughts on what else this could be?

POST 10Original post

Quotes source post: 16025114

I went through this too, it was the gas cap. Look at the rubber seal inside the cap. If it has any cracks, it could be your issue. Many others have gone through the same.

POST 11 / ORIGINAL POSTEROriginal post

Cheers, I will give that a try. Did you buy a new cap or just find a seal replacement?

POST 12Original post

Quotes source post: 16025138

New cap was under $20.00 if I recall.

POST 13Original post

Try the cheap new gas cap first. If not that, then a smoke test.

POST 14Original post

Don't buy just any old gas cap...get a new gas cap from Porsche. One that is the right one for your car. #14 here with part number http://www.autoatlanta.com/porsche-p...section=201-00

POST 15 / ORIGINAL POSTEROriginal post

Thanks all with give the new cap a try first.

POST 16 / ORIGINAL POSTEROriginal post

Worked like a charm - no more dash lights!

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