Planet-9

Cats going bad? What options for replacement?

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHCats going bad? What options for replacement?

Leading reported evidence

Replace drivers side secondary o2 sensor

Performed · outcome unconfirmed

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
I have swapped the drivers side secondary O2 sensor with the passenger side and it still throws the same code so it's not the sensor.
Original post Read captured discussion
Cats going bad? What options for replacement?

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Leading evidence: 'Replace drivers side secondary o2 sensor' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'cats going bad' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Replace drivers side secondary o2 sensor' (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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1 matching discussions · 4 captured posts examined · 1 partial discussions

Compare 2 other evidence results

cats going bad

Suggestion or failed attempt

No successful repair reported for this finding.

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Identified cause: 1
Suspected cause: 0
Reported fixes

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Discussions that suspect a cause: 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.

Suspected cause
It makes me think it's probably the cats going bad.
Original post Read captured discussion
Cats going bad? What options for replacement?

Set posted

Suggestion or failed attempt

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Reported fixes: 0
Unsuccessful attempts: 1
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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
Just saw a set posted on ******** for sale this morning...
Original post Read captured discussion
Cats going bad? What options for replacement?

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.

Replace drivers side secondary o2 sensor

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
I have swapped the drivers side secondary O2 sensor with the passenger side and it still throws the same code so it's not the sensor.
Original post Read captured discussion
Cats going bad? What options for replacement?

Set posted

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
Just saw a set posted on ******** for sale this morning...
Original post Read captured discussion
Cats going bad? What options for replacement?

Reported and suspected causes (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

cats going bad

No successful repair reported for this finding.

0
Identified cause: 1
Suspected cause: 0
Reported fixes

Read evidence and context

Discussions that suspect a cause: 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.

Suspected cause
It makes me think it's probably the cats going bad.
Original post Read captured discussion
Cats going bad? What options for replacement?

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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.

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: 20261026T150451Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

My car is an 07 cayman S with 41,000 miles miles. Over the last year I have been dealing with the car throwing a P0421 code which is a catalytic converter warm up error. I have swapped the drivers side secondary O2 sensor with the passenger side and it still throws the same code so it's not the sensor. It makes me think it's probably the cats going bad. However the car runs just fine. Would it run fine in the early stages of cats going bad? If they do need replacement what are my best options? I think OEM will be extraordinarily expensive. I currently have a Borla Catback exhaust which sounds amazing. Would going completely catless make the car obnoxiously loud? looking for comments on headers vs some other brand of sport cats.

POST 2Original post

Just saw a set posted on ******** for sale this morning... I'd try talking him down a bit. (for 42k mile OEM headers, ~$300 seems like a common list price) 987 OEM catalytic converter/headers - ******** Discussion Forums If you go catless, don't forget to budget software for cat delete.

POST 3Original post

maybe you'd try something like the vibrant 11621 o2 sensor spacer. Just something to think about.

POST 4Original post

Can you elaborate how vibrant O2 sensor would help?

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