Rennlist

Check engine Code 456

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Original source

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHCheck engine Code 456

Leading reported evidence

Check underside of the cap

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
(BTW checked underside of the cap.
Original post Read captured discussion
Check engine Code 456

Read full discussion summary

Leading evidence: 'Check underside of the cap' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check underside of the cap' (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 · 7 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Run scan and the code was gone

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 turned off the car and turned it on again, ran the scan and the code was gone????
Original post Read captured discussion
Check engine Code 456

Tighten cap

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
Did you tighten the cap?
Original post Read captured discussion
Check engine Code 456

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 underside of the cap

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
(BTW checked underside of the cap.
Original post Read captured discussion
Check engine Code 456

Run scan and the code was gone

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 turned off the car and turned it on again, ran the scan and the code was gone????
Original post Read captured discussion
Check engine Code 456

Tighten 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
Did you tighten the cap?
Original post Read captured discussion
Check engine Code 456

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.

7 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: 20261026T161109Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Just got a code 456 (read on an autozone scanner) it said "code 0456 Very small evaporative systems leak" I assume that is a loose gas cap or faulty gas cap? Cleared the code - hope it stays that way ....:-|

POST 2Original post

Did you tighten the cap? It should click about 5 times. check it for damage to threads or gasket.

POST 3Original post

And be sure you have the new cap that comes with the recall.

POST 4 / ORIGINAL POSTEROriginal post

Quotes source post: 7036794

ok what recall and what new cap! Sorry for the nube question...

POST 5 / ORIGINAL POSTEROriginal post

Quotes source post: 7036882

Ok just did a search. I will check the part number to see if it's the older one

POST 6 / ORIGINAL POSTEROriginal post

Quotes source post: 7036794

If it is a recall, can I just bring to the dealer to get it replaced? (BTW checked underside of the cap. That rubber seal is all cracked. )

POST 7Original post

I am reactivating this thread. I had some time ago a CEL and it showed P0456 very small evap leak. My indy cleared the CEL and I bought a new gas cap and I drove the car now for 250 miles, everything so far ok. Today I hooked up my icarsoft and in the obd section it showed again the code p0456 but there was no CEL. I turned off the car and turned it on again, ran the scan and the code was gone???? Any idea what it could be? My car is out of warranty but I still have the emission warranty in california, was wondering if it would make sense to have it checked at the dealership. Any advise would be appreciated.

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