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CEL P0455 code - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHCEL P0455 code - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Test each component

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No successful repair reported for this finding.

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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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Suggestion

Thus, you will need to test the system for leaks and then test each component to find the root cause of the fault.

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CEL P0455 code - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'Test each component' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Test each component' (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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Test system

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

Thus, you will need to test the system for leaks and then test each component to find the root cause of the fault.

Original post Read captured discussion
CEL P0455 code - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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.

Test each component

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

Thus, you will need to test the system for leaks and then test each component to find the root cause of the fault.

Original post Read captured discussion
CEL P0455 code - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Test system

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

Thus, you will need to test the system for leaks and then test each component to find the root cause of the fault.

Original post Read captured discussion
CEL P0455 code - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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.

  • 986Forum: 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: 20261026T191851Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Well I had a CEL come on and found code P0455. I tried a new gas cap and cleared the code but it came back on about 100 miles later. What should I try next? Also, where is the canister purge valve located? Thank. Ernie

POST 2Original post

Quotes source post: 598236

This code says that there is a large leak in the EVAP system. Unfortunately, the code doesn't provide any more detail about exactly what might be leaking. Thus, you will need to test the system for leaks and then test each component to find the root cause of the fault. It is located in the passenger side front wheel well at the top of the carbon canister. You have to remove the wheel and then the inner wheel liner to see it. This link has a photo. https://www.renntech.org/topic/41644-evap-canister-valve/

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