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Persistent P0442 EVAP Small Leak on C4 Cab...

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

Discussion summary

YOUR RESEARCHPersistent P0442 EVAP Small Leak on C4 Cab...

Leading reported evidence

Use durametric

Performed · outcome unconfirmed

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 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

So I finally did a smoke test, pumping in smoke from the engine side where the purge valve goes and used the durametric to close off the charcoal canister valve and no smoke.

Original post Read captured discussion
Persistent P0442 EVAP Small Leak on C4 Cab...
Frequently discussed work

Run perfect ever since

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

It has been running perfect ever since.

Original post Read captured discussion
Persistent P0442 EVAP Small Leak on C4 Cab...
Read full discussion summary

Leading evidence: 'Use durametric' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run perfect ever since' (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 · 3 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Run perfect ever since

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

It has been running perfect ever since.

Original post Read captured discussion
Persistent P0442 EVAP Small Leak on C4 Cab...

Smoke-test pumping in smoke

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

So I finally did a smoke test, pumping in smoke from the engine side where the purge valve goes and used the durametric to close off the charcoal canister valve and no smoke.

Original post Read captured discussion
Persistent P0442 EVAP Small Leak on C4 Cab...
Frequently discussed actions (3)

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

Run perfect ever since

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

It has been running perfect ever since.

Original post Read captured discussion
Persistent P0442 EVAP Small Leak on C4 Cab...

Smoke-test pumping in smoke

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 I finally did a smoke test, pumping in smoke from the engine side where the purge valve goes and used the durametric to close off the charcoal canister valve and no smoke.

Original post Read captured discussion
Persistent P0442 EVAP Small Leak on C4 Cab...

Use durametric

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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

So I finally did a smoke test, pumping in smoke from the engine side where the purge valve goes and used the durametric to close off the charcoal canister valve and no smoke.

Original post Read captured discussion
Persistent P0442 EVAP Small Leak on C4 Cab...
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.

3 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: 20261026T183130Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hey all. I have a persistent P0442 code that comes up every once in a while and it is really annoying. So far, I've changed the engine side Purge Valve, the fuel line vent valve and got a new gas cap. Still the annoying check engine light with code P0442 comes back every so often. So I finally did a smoke test, pumping in smoke from the engine side where the purge valve goes and used the durametric to close off the charcoal canister valve and no smoke. It was hard to see the smoke so then I pulled vaccum on the engine side tube where the purge value connects. I tested to make sure that I get no vacuum when the charcoal canister valve is open and that was so, Then I close the valve with durametric and can pull vacuum. I pulled about 20 Hg and left it there for more than an hour and the needle didn't move. It held vacuum totally. So the system is sealed and no leaks are present. The only variable is the cannister valve since the engine side purge valve is brand new from Sonnen Porsche-although, come to think of it, I've never really tested that either. Is there anything wrong with my logic here or can I deduce that the system is sealed and that the canister valve has inconsistent sealing and causes a leak every once in a while and to change it? Thanks in advance!

POST 2Original post

Any update on the emissions slow leak? Been getting the same code bon my 2011 Cayenne Turbo

POST 3 / ORIGINAL POSTEROriginal post

It wasnt anything mentioned in the original post. My mechanic ended up fixing it. It was another valve I never heard of. Sorry dont remember. Got the smog done and sold it right away. It has been running perfect ever since. I know because my brother bought it and loves it.

This is a source reference. Confirm exact model applicability in the original material.