7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996 3.4 fault codes P1124, P1126
Leading reported evidence
Replace maf and one oxygen sensor
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that performed work without a confirmed outcome
1
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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
MAF and one oxygen sensor has been replaced, no noticeable change.
Leading evidence: 'Replace maf and one oxygen sensor' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check next (possible vacuum leak)' (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
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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.
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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.
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.
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1
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Suggestion · Original poster
Tried to use start pilot to look for the leaks near the throttle body - Couldn't find any leaks
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.
7 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Pelican Parts: 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: 20261026T024951Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi everyone,
Just bought my first Porsche and have some problems already:
My 996 3.4 is getting the following fault codes;
P1124 Oxygen sensing range 1 Cylinder (1-3)
P1126 Oxygen sensing range 1 Cylinder (4-6)
P0441 Fuel tank ventilation minor leak exceeds limit value
P0130 O2 sensor ahead of cat. conv. Cylinder (1-3)
Idles quite poorly, when driving feels normal, at least what I can tell.
MAF and one oxygen sensor has been replaced, no noticeable change.
With my mates Durametric, we got these values;
Oxygen sensing cylinders 1-3 1,00
Oxygen sensing cylinders 4-6 1,25
- after some 10 minutes idle these both go to about same values; 1,03/1,04
FRA 1,03
FRA2 1,04
TRA 0,00
TRA2 0,35
What should I check next (possible vacuum leak)?
Thanks for help.
That is where you should have started as none of the sensors needed to be replaced, but the codes were telling you that the DME had reached its enrichment limit on both banks. That means you have a vacuum leak that affects both banks.
So I did the following things:
1. Removed the evap valve from it's place and plugged both ends from the hose that goes into the intake manifold - No effect on idle
2. Tried blowing through the evap valve - No leaks so i guess that's working ok (or atleast not leaking)
3. Tried to use start pilot to look for the leaks near the throttle body - Couldn't find any leaks
Should I use a smoke machine now? What's the best place to put smoke into the engine to look for leaks (Throttle body, oil filler tube)?
What other things should i check? What are the symptoms for bad aos?
I pumped smoke to the engine via the oil filler tube and the only place I could find that the smoke was coming from was through the sides of throttle body plate. Is there a way to check that idle control valve is functioning properly?
