4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHP0430 - Which Cat? 2003 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Check including the wave forms he was seeing
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.
Suggestion
had the same problem and there is a discussion there on what he was checking including the wave forms he was seeing.
P0430 - Which Cat? 2003 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'Check including the wave forms he was seeing' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check including the wave forms he was seeing' (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 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 · Original poster
Which is the correct part to change associated with a P0430 on a 2003 S?
P0430 - Which Cat? 2003 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Test )
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.
Suggestion · Original poster
The local indys here in St Louis want to raid my wallet to diagnose the 02 sensors (which I can swap myself to test) but tbh I'm not impressed with any of the 3 indys I have to choose from, and shocked by the simple things they've missed.
P0430 - Which Cat? 2003 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Test )
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 · Original poster
The local indys here in St Louis want to raid my wallet to diagnose the 02 sensors (which I can swap myself to test) but tbh I'm not impressed with any of the 3 indys I have to choose from, and shocked by the simple things they've missed.
P0430 - Which Cat? 2003 S - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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.
986Forum: 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: 20261026T220748Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
P0430, associated with the bank 2 catalytic converter - the "three way" or "main" cat
Which one is that? The one that's part of the manifold assembly? Or the one after that? Which is the correct part to change associated with a P0430 on a 2003 S?
the one circled in
red
(99611310407)
or the one circled in
blue
(996-113-023-BX)
Before anyone suggests local shops, I only really trust the main Porsche dealer here now. The local indys here in St Louis want to raid my wallet to diagnose the 02 sensors (which I can swap myself to test) but tbh I'm not impressed with any of the 3 indys I have to choose from, and shocked by the simple things they've missed. Like overfilling at every oil change, completely missing my failing 2nd gear synchro at PPI and a visit to a different indy, and somehow missing my totally toasted engine mount even though I specifically asked for it to be checked. So now I do the work myself if Porsche is backed up. That and the highway robbery: $450 for an alignment at one shop (Porsche STL charges $250, a local track prep shop $220...), trying to charge me $1100 at another well-known shop for an oil change and coolant flush ($550 at the dealership...)
I'd bring it into Porsche but my Cayenne is going in next week for a DEF tank heater, and since my QuickJack just arrived and I'll have a Macan loaner I was going to tackle this problem on the 986 myself.
And yes, I do need a Durametric now.
[Image-only or quote-only post; no author-written text.]
https://encrypted-tbn0.gstatic.com/shopping?q=tbn:ANd9GcRvnMbliEOLUTewe0K80GKXbEdfFDUvgfTT66MhJpIVFUOB_n4nCrfsoPzzNcLa57PQ69fPraO9U7by9lnBtzKua6u6i7VVSxXFGJfQt8vt7DybyYFMjw3i
What kind of diagnostic tools do you have? Any that will display the wave form of the O2 sensors signals?
https://986forum.com/forums/boxster-general-discussions/77357-p0430-what-do-post626811.html#post626811
had the same problem and there is a discussion there on what he was checking including the wave forms he was seeing.
This is a source reference. Confirm exact model applicability in the original material.
