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Planet-9

08 Cayman P0456 CEL - Evap Emission System Leak Detected

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Original source
12 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH08 Cayman P0456 CEL - Evap Emission System Leak Detected

Leading reported evidence

Use bluetooth

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

Used an old Bluetooth

08 Cayman P0456 CEL - Evap Emission System Leak Detected
Frequently discussed work

Replace 13 year old gas

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

Probably just wasn’t fully secured to begin with, certainly no harm in replacing a 13 year old gas

08 Cayman P0456 CEL - Evap Emission System Leak Detected
Read full discussion summary

Leading evidence: 'Use bluetooth' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace 13 year old gas' (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.

Read captured replies

1 matching discussions · 12 captured posts examined · 1 partial discussions

Compare 4 other evidence results

Replace 13 year old gas

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

Probably just wasn’t fully secured to begin with, certainly no harm in replacing a 13 year old gas

08 Cayman P0456 CEL - Evap Emission System Leak Detected

Replace back out of a $20 bill

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

dealers will be giving you change back out of a $20 bill..

08 Cayman P0456 CEL - Evap Emission System Leak Detected

Tighten after it "coded" wasn't enough

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

repairs are legitimate, just tightening after it "coded" wasn't enough on my 2011.

08 Cayman P0456 CEL - Evap Emission System Leak Detected

Tighten gas

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

no I didn’t fill up but I did try opening and re-tightening the gas

08 Cayman P0456 CEL - Evap Emission System Leak Detected
Frequently discussed actions (5)

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

Replace 13 year old gas

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

Probably just wasn’t fully secured to begin with, certainly no harm in replacing a 13 year old gas

08 Cayman P0456 CEL - Evap Emission System Leak Detected

Replace back out of a $20 bill

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

dealers will be giving you change back out of a $20 bill..

08 Cayman P0456 CEL - Evap Emission System Leak Detected

Tighten after it "coded" wasn't enough

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

repairs are legitimate, just tightening after it "coded" wasn't enough on my 2011.

08 Cayman P0456 CEL - Evap Emission System Leak Detected

Tighten gas

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

no I didn’t fill up but I did try opening and re-tightening the gas

08 Cayman P0456 CEL - Evap Emission System Leak Detected

Use bluetooth

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

Used an old Bluetooth

08 Cayman P0456 CEL - Evap Emission System Leak Detected
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.

12 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Planet-9: 1 discussions

0 evidence records excluded for query context · 1 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261027T000231Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Just received this while driving home P0456 CEL - Evap Emission System Leak Detected(very small leak). 08 Cayman base with 42K miles. Suncoast list this part- Leak Detection Module SKU: 95860510700 $315. Anyone else encounter this issue? Will be taking it to my indy shop later this week. thanks

POST 2Original post

By any chance did you put gas in the tank prior to getting the error code? May be a loose gas cap .

POST 3Original post

If tightening the cap doesn't clear this, I'd try greasing the cap seal with some silicone grease to see if the gasket is leaking. If that stops the error message chances are you need a new cap (way cheaper than having a shop deal with it.)

POST 4Original post

no I didn’t fill up but I did try opening and re-tightening the gas cap several times. Thanks

POST 5Original post

let me try silicone grease, it can be a cheap fix considering the gas cap is 14 years old. Thanks for the suggestion.

POST 6Original post

If it's like my car was you're going to have to clear a code to know whether the gas cap repairs are legitimate, just tightening after it "coded" wasn't enough on my 2011.

POST 7Original post

I had this issue on both my previous Boxster and then on my Cayman . The leak detection pump went out fowling the charcoal canister. It is mainly caused ( I later found out) by topping off your tank according to my mech. The repair was $650. at my Indy. The Porsche dealer wanted $1200!!!!

POST 8Original post

I've always heard that topping off fuel on a modern car can do this kind of stuff... thanks for telling us about the specifics, as it's a great story to tell. Admitting you made a mistake shows great character as well! Kudos!

POST 9Original post

Just close the loop, it was a defective gas cap that needed replacement. The rubber seals was cracked. Thanks y’all

POST 10Original post

This thread saved me a trip to the stealership. Greased the inside of the cap . Used an old Bluetooth obd scanner and cleared the code with my phone. All better, thanks guys!

POST 11Original post

You might consider investing in a new cap sometime. The grease may work forever, or it might work for a day or two. A new cap solves the issue, and in the grand scheme of Porsche ownership - isn't very expensive. Even Porsche dealers will be giving you change back out of a $20 bill..

POST 12Original post

Absolutely, I don’t mind buying a new cap . Just thrilled to figure out that was the issue. Probably just wasn’t fully secured to begin with, certainly no harm in replacing a 13 year old gas cap . Last week it threw every code I had ever seen, I was overjoyed to spend $250 on a new battery . Also this thread convinced me not to “top off” my vehicles.

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