Pelican Parts

P0453 diagnosis

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Original source

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHP0453 diagnosis

Leading reported evidence

Replace gas 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
I replaced the gas cap, and that had no effect.
Original post Read captured discussion
P0453 diagnosis

Frequently discussed work

Check wiring

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
Check your wiring from the sensor to the DME for a short to B+.
Original post Read captured discussion
P0453 diagnosis

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Leading evidence: 'Replace gas cap' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check wiring' (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 · 4 captured posts examined · 0 partial discussions

Compare 1 other evidence results

Check wiring

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
Check your wiring from the sensor to the DME for a short to B+.
Original post Read captured discussion
P0453 diagnosis

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.

Check wiring

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
Check your wiring from the sensor to the DME for a short to B+.
Original post Read captured discussion
P0453 diagnosis

Replace gas 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
I replaced the gas cap, and that had no effect.
Original post Read captured discussion
P0453 diagnosis

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.

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

Pelican Parts: 1 discussions

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

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

Outcome without a verified action link
Naturally I am planning to leave in one week for the PCA Escape- a 3k mile road trip- so I'd like to get this resolved before beginning that drive.
Original post Read captured discussion
No unique explicit quoted action; no causal link assigned

Generation: 20261026T103553Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

My '99 Carrera recently threw a CEL with error code P0453, Evaporative Emission System Pressure Sensor/Switch High. I replaced the gas cap, and that had no effect. I don't hear any noises like it's a venting issue as described in the 101 book. How can I troubleshoot this? Naturally I am planning to leave in one week for the PCA Escape- a 3k mile road trip- so I'd like to get this resolved before beginning that drive. Thanks!

POST 2Original post

Yes, P0453 indicates that the pressure sensor is reading above its limit, which is usually a wiring short in the harness. Check your wiring from the sensor to the DME for a short to B+.

POST 3 / ORIGINAL POSTEROriginal post

Thanks. What are the potential consequences of ignoring this until after my trip? I don't think I'll have time to dig into this before we're scheduled to leave on the road trip.

POST 4Original post

I would not ignore it. 3K miles makes for a long walk.

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