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Cel po430 could this be a failing maf?

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHCel po430 could this be a failing maf?

Leading reported evidence

Clean maf thoroughly and reinstalled

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 cleaned maf thoroughly and reinstalled.
Original post Read captured discussion
Cel po430 could this be a failing maf?

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Leading evidence: 'Clean maf thoroughly and reinstalled' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean maf thoroughly and reinstalled' (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 2 other evidence results

Install by porsche main dealer at 90,000 miles in 2009

Performed · outcome unconfirmed

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
The engine is a reman installed by Porsche main dealer at 90,000 miles in 2009.
Original post Read captured discussion
Cel po430 could this be a failing maf?

Replace plugs & coils last weekend

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 1
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that report an unsuccessful attempt: 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.

Unsuccessful attempt · Original poster
I changed the plugs & coils last weekend but that did not fix it.
Original post Read captured discussion
Cel po430 could this be a failing maf?

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.

Clean maf thoroughly and reinstalled

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 cleaned maf thoroughly and reinstalled.
Original post Read captured discussion
Cel po430 could this be a failing maf?

Install by porsche main dealer at 90,000 miles in 2009

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
The engine is a reman installed by Porsche main dealer at 90,000 miles in 2009.
Original post Read captured discussion
Cel po430 could this be a failing maf?

Replace plugs & coils last weekend

No successful repair reported for this finding.

0
Reported fixes: 1
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that report an unsuccessful attempt: 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.

Unsuccessful attempt · Original poster
I changed the plugs & coils last weekend but that did not fix it.
Original post Read captured discussion
Cel po430 could this be a failing maf?

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.

Rennlist: 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
I had the same issue, Techron fixed it for a while but I ended up with a new exhaust - which sounds wonderful!
Original post Read captured discussion
No unique explicit quoted action; no causal link assigned

Generation: 20261026T135432Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi all, I am a new menber to the site. I have a 2000 milenium. I am the 3rd owner and the car has 150,000 miles on the chasis. The engine is a reman installed by Porsche main dealer at 90,000 miles in 2009. I have owner the car 3 years & put only 5,000 miles on it. The car is great, and the performance is amazing. Last year I had some smoke & codes 1128 & 1130. I suspected aos as it was around 60,000 miles on engine. I replaced that and that took care of codes & smoke. Since my ownership of 3 years the pcm & abs lights have been coming on but not all the time. It has a slight hunting idle and shakes/vibrates a bit at around 1300-1600 rpm. I changed the plugs & coils last weekend but that did not fix it. I cleaned maf thoroughly and reinstalled. After 300 miles pcm & abs lights came back and cel. The code on cel is po430. I am wondering could this be it needs a new maf or could it be a blown cat or o2 sensors? Any thoughts and ideas would be appreciated. Thanks Dan.

POST 2Original post

Welcome to Rennlist ! Cel P0430 is usually a bad cat. It are elements inside the cat that come loose.

POST 3Original post

Welcome! Don't forget to add your Millennium to the Registry thread, here: https://rennlist.com/forums/996-foru...stry-info.html I agree with Gert, it's most likely cat(s) ... I had the same issue, Techron fixed it for a while but I ended up with a new exhaust - which sounds wonderful!

POST 4 / ORIGINAL POSTEROriginal post

Ok thanks guys. Deff could be cat. Only reason I was leaning towards maf sensor is because of pcm & abs lights coming on intermittently. I read somewhere they can be triggered by failing maf for some reason. Also would a bad cat cause hunting idel & engine missing at 1300-1600 rpm. I have ordered a new bosch maf sensor. I will put that in see if it helps. Prob due anyway. If not then I will concerntrate on cat. Dan.

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