3 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHP0430 & P1109 Error Code
Leading reported evidence
Replace mass air flow 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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Performed · outcome unconfirmed · Original poster
I just replaced the Maf with a brand new unit from Suncoast.
Leading evidence: 'Replace mass air flow sensor' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Adjust unit' (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.
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Performed · outcome unconfirmed
I run Shell but Chevron is ok and there are some others brands: Unocal 76, Philips 66, etc.
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Discussions that contain suggestions
1
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Check any aging oxygen sensor codes and if present
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
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Suggestion
If the P0430 error code comes back the guidelines are to check for any aging oxygen sensor codes and if present replace the sensors and clear the codes and drive the car some more.
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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Suggestion
Also check the pins in the connector that goes to the throttle body as I've seen them loose/pushed out before.
Check any aging oxygen sensor codes and if present
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.
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Suggestion
If the P0430 error code comes back the guidelines are to check for any aging oxygen sensor codes and if present replace the sensors and clear the codes and drive the car some more.
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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.
Suggestion
I do not know the history of your car, but before you replace the converter ($$) (and there is an argument that can be made that both should be replaced which is even more $$$$), if the plugs are due to be changed, change them.
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.
3 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: 20261026T130754Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi Guys,
I am a little stumped right now, searched around and haven't seen another car with this combination of error codes.
Car Info:
My car is a 2002 911 Carrera 2 w/ 60k miles
I just replaced the Maf with a brand new unit from Suncoast.
Cleaned the Throttle body yesterday.
Code came back exactly the same after the throttle body cleaning.
P1109 - Input variables, charge measurement
Above limit
P0430 - Factory Fault Code 45 - TWC conversion, Bank 2
Above limit
Any ideas as to what I should be checking? O2 sensor? which one? Catalytic? Thanks in advance
For the P1109 you may need to replace the throttle body. There may be an issue in the adjusting unit. Also check the pins in the connector that goes to the throttle body as I've seen them loose/pushed out before.
For the P0430 the only thing to do is replace the catalytic converter. You might want to check with the dealer and see if they'll help you out. There's an 8 year 80k warranty on the cat.
Address the cause of P1109 first.
Clear the codes then drive the car some more to see if P0430 comes back.
If the P0430 error code comes back the guidelines are to check for any aging oxygen sensor codes and if present replace the sensors and clear the codes and drive the car some more.
If after this the P0430 error code comes back, or if there are no O2 sensor codes, the converter is wearing/worn out: converter can't store oxygen.
However, the converter might still be ok most of the time. For instance (based on my experience) it might work better in warmer weather. I've been 'nursing' a P0430 on my 02 Boxster now for a couple of years, even managing to get the car through smog checks -- with no funny business either everything on the up and up -- which I have to have done every other year in May.
I do not know the history of your car, but before you replace the converter ($$) (and there is an argument that can be made that both should be replaced which is even more $$$$), if the plugs are due to be changed, change them. Coils might be considered for replace as well even if there are no misfire codes.
(If plugs/coils ok then you might instead put this money towards the cost of a new converter.)
Regardless about the plugs and coils, it can't hurt to run a bottle or two of Techron through the engine (gas tank) following the instructions on the bottle label. I like to do this just before an oil change that is changing the oil/filter after the last tank treated with Techron is down to say 1/4 tank or lower.
Doing the above might (might) buy you some time. In the past once warmer weather sets in I can drive my Boxster for all the summer months without seeing the P0430 once. Oh, it helps to keep the P0430 away I've found to run a name brand of gas and of course a premium grade of gas. I run Shell but Chevron is ok and there are some others brands: Unocal 76, Philips 66, etc.
Sincerely,
Macster.
This is a source reference. Confirm exact model applicability in the original material.
