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Code P0455... Help!

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3 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHCode P0455... Help!

Leading reported evidence

Check car

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 checked out the code, and checked my car...
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Code P0455... Help!

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Leading evidence: 'Check car' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check car' (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

Check on the ventilation line

Suggestion or failed attempt

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
I believe Loren also recommended to check on the ventilation line that is attached to the Evap canister system, or ventilation line that is detached from the tank, or something related to the ventilation line in general.
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Code P0455... Help!

Run car

Suggestion or failed attempt

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
But I think the consensus was the missing gas cap or maybe you ran the car with the gas cap open?
Original post Read captured discussion
Code P0455... Help!

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.

Check car

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 checked out the code, and checked my car...
Original post Read captured discussion
Code P0455... Help!

Check on the ventilation line

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
I believe Loren also recommended to check on the ventilation line that is attached to the Evap canister system, or ventilation line that is detached from the tank, or something related to the ventilation line in general.
Original post Read captured discussion
Code P0455... Help!

Run car

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
But I think the consensus was the missing gas cap or maybe you ran the car with the gas cap open?
Original post Read captured discussion
Code P0455... Help!

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: 20261027T150039Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

heys guys, so checked out the code, and checked my car... no leaks around the tank, new gas cap... What else can it be? I clear the code, but it comes on after a few hours of driving. Has anyone experienced this issue? (2002 C2 Cabrio) thanks-

POST 2Original post

There was a similar post on this Cel code not long ago... But I think the consensus was the missing gas cap or maybe you ran the car with the gas cap open? I believe Loren also recommended to check on the ventilation line that is attached to the Evap canister system, or ventilation line that is detached from the tank, or something related to the ventilation line in general. Let us know if you found the root cause to this Cel code. Good-luck...

POST 3Original post

P0455 Fuel Tank Ventilation System (Major Leak) - Below Lower Limit Potential causes: - Tank cap missing or o-ring bad or missing. - Ventilation lines detached from EVAP canister. - Ventilation line detached from tank. - Ventilation lines detached from operating vent valve. - Ventilation line detached from fuel tank vent valve. - Break in ventilation lines.

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