8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHRemember that rattle from a couple of months ago? Bad Cats.
Leading reported evidence
Replace suspicion was 02 sensors
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
My suspicion was 02 sensors because those have been replaced twice before as well.
Remember that rattle from a couple of months ago? Bad Cats.
Read full discussion summary
Leading evidence: 'Replace suspicion was 02 sensors' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check fitment' (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.
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
These felines have been replaced under the new car warranty before.
Remember that rattle from a couple of months ago? Bad Cats.
Check fitment
Suggestion or failed attempt
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 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.
Remember that rattle from a couple of months ago? Bad Cats.
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.
8 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: 20261026T144035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
These felines have been replaced under the new car warranty before.
Well, 2 days ago, the CEL went on. My suspicion was 02 sensors because those have been replaced twice before as well.
The annoying thing is that while the car is under CPO for another month, the emissions warranty on the car (8/80) has run out as I have 80,909 miles!
Uggh.
I have a call into PCNA to see if they'll warranty the cats. It's kind of ridiculous to think that the car would go through that many catalytic converters so far. Upon searching it seems that the 996 is prone to this very issue (engine vibrations?).
The car has been serviced religiously (no fouled plugs at all ever) so I wonder what the cause of the failures really is.
BTW, will 99 3.4 felines fit the 03 3.6 engine?
I just bought a set of hi flow cats for my 99 996. I would be happy to sell mine for a great price if they will fit your car. They have about 36,000 miles on them.
Both of mine broke within 25k miles, and I know of two other people in Charlotte this has happened to. Of course, all three cars were tracked regularly and I wonder if that was a contributor. However, my old '87 was also tracked often over the course of several years and never had a cat problem. This has got to be a weak spot for 996s.
For those that don't know, if your cats go bad BEFORE 8 years/80K from your in service date, they should be covered for replacement by the dealer under federal emissions law. Assuming you haven't voided the warranty in some way (i.e., with upgrades to your exhaust). If you have a 2002+ vehichle, I would guess you are golden. I see that the OP has missed that deadline by a few miles...
As for me, I'm out of that time period, which is why I need a cheapo replacement.
-td
