Planet-9

P0431, P0421

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Original source

6 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHP0431, P0421

Leading reported evidence

Run bit better

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
Added the spacer and it moved the O2 sensor out of the direct stream and it ran a bit better.
Original post Read captured discussion
P0431, P0421

Frequently discussed work

Check engine

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
('07) that recently has started popping codes/check engine.
Original post Read captured discussion
P0431, P0421

Read full discussion summary

Leading evidence: 'Run bit better' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check engine' (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 · 6 captured posts examined · 1 partial discussions

Compare 2 other evidence results

Check engine

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
('07) that recently has started popping codes/check engine.
Original post Read captured discussion
P0431, P0421

Use spacer

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 the meaning is to use a spacer on the
Original post Read captured discussion
P0431, P0421

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 engine

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
('07) that recently has started popping codes/check engine.
Original post Read captured discussion
P0431, P0421

Run bit better

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
Added the spacer and it moved the O2 sensor out of the direct stream and it ran a bit better.
Original post Read captured discussion
P0431, P0421

Use spacer

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 the meaning is to use a spacer on the
Original post Read captured discussion
P0431, P0421

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.

6 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 · 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: 20261026T112012Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Trying to sort out a next step here and was hoping for advice. I have a 987 Cayman S ('07) that recently has started popping codes/check engine. The car has a Borla Exhaust , I am assuming the Cat back, it was there when I bought it. I have had the 02 sensors gapped and it went away for a while. Came back up about a year later. Changed and gapped the sensors and it went away for a few months but now it is popping up again. If I need a new catalytic converter , that's fine but if the after-market exhaust is the problem, was hoping for some help there. Anyone else have this issue and fix it?

POST 2Original post

I had this problem from getting a tank of gas at a different gas station than I was used to. In fact it was a non-ethanol 93 octane gas pump. I filled up at my usual place with 10% ethanol and the codes went away. These cars are extremely sensitive and intermittent codes should be heartily ignored in my opinion. The O2 sensors are like the electronic dip stick. More of a suggestion that needs multiple confirmations rather than a fact.

POST 3Original post

What s gapping an O2 sensor? And how is it done?

POST 4Original post

I believe the meaning is to use a spacer on the O2 sensor . This spaces it out of the direct exhaust stream, and can sometimes help eliminate codes. You can find them on Ebay and other sites. I actually found one that also includes a miniature "cat" in the fitting: Car Engine Light O2 Oxygen Sensor Spacer Adapter Bung Built-In M18X1.5 Catalyt 4282329172231 | eBay

POST 5Original post

What he said ^^^^^^ I had two separate mechanics suggest it. I cleared the codes twice and it hasn't happened in a day or so but I am sure it isn't done.

POST 6Original post

Actually used one of these about 25 years ago on an '87 BMW 535i.. that ran lean. Added the spacer and it moved the O2 sensor out of the direct stream and it ran a bit better.

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