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Another P0446 & P1109 thread

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3 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHAnother P0446 & P1109 thread

Leading reported evidence

Clean 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

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

As suggested on the forum I have tried blowing out the lines on the charcoal canister, replaced the vapor canister purge valve, regeneration valve, fuel cap, and cleaned the MAF.

Original post Read captured discussion
Another P0446 & P1109 thread
Frequently discussed work

Check valve

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

Did u check the valve on top of the fuel tank.

Original post Read captured discussion
Another P0446 & P1109 thread
Read full discussion summary

Leading evidence: 'Clean 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 'Check valve' (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 · 3 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Replace vapor canister purge valve, regeneration valve, fuel cap

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

As suggested on the forum I have tried blowing out the lines on the charcoal canister, replaced the vapor canister purge valve, regeneration valve, fuel cap, and cleaned the MAF.

Original post Read captured discussion
Another P0446 & P1109 thread

Check valve

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

Did u check the valve on top of the fuel tank.

Original post Read captured discussion
Another P0446 & P1109 thread

Check wire continuety back

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

If not u need to check wire continuety back to dme.

Original post Read captured discussion
Another P0446 & P1109 thread

Smoke-test intake

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

Another thing to try is to smoke test the intake.

Original post Read captured discussion
Another P0446 & P1109 thread
Frequently discussed actions (5)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check valve

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

Did u check the valve on top of the fuel tank.

Original post Read captured discussion
Another P0446 & P1109 thread

Check wire continuety back

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

If not u need to check wire continuety back to dme.

Original post Read captured discussion
Another P0446 & P1109 thread

Clean mass air flow sensor

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

As suggested on the forum I have tried blowing out the lines on the charcoal canister, replaced the vapor canister purge valve, regeneration valve, fuel cap, and cleaned the MAF.

Original post Read captured discussion
Another P0446 & P1109 thread

Replace vapor canister purge valve, regeneration valve, fuel cap

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

As suggested on the forum I have tried blowing out the lines on the charcoal canister, replaced the vapor canister purge valve, regeneration valve, fuel cap, and cleaned the MAF.

Original post Read captured discussion
Another P0446 & P1109 thread

Smoke-test intake

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

Another thing to try is to smoke test the intake.

Original post Read captured discussion
Another P0446 & P1109 thread
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.

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

POST 1 / ORIGINAL POSTEROriginal post

I have been chasing the solution to these codes on my 2003 996 C4s for almost a year now. I have done a lot of research on the forum but still can come up with a fix. The P0446 is Porsche fault code 95 shutoff valve for the activated charcoal filter and P1109 is Porsche fault code 594 for input variables charge measurement. As suggested on the forum I have tried blowing out the lines on the charcoal canister, replaced the vapor canister purge valve, regeneration valve, fuel cap, and cleaned the MAF. Does everyone really think the canister might be the issue? its the only thing I have not replaced.... The thing that sucks as once I fix/replace something and clear these codes sometimes it takes as much as 300 miles to resurface. I have noticed it seems to take the car longer and longer to get through the readiness and eventually triggers the light.

POST 3Original post

Did u check the valve on top of the fuel tank. Have u tested it to see if it closes? If that valve is good u have to see if its actually getting the signal to close. If not u need to check wire continuety back to dme. Same thing for the regen valve that goes into the throttle body. I had bad pins in my dme plug due to a tech speading the teeth with too big of a probe. This cause a random o2 issue 4 me. Im pretty sure the piwis can triger both of these on command. Another thing to try is to smoke test the intake. Its seams suspicious that the regen valve goes into the tb and u r getting a code for both? Should be part #9.

This is a source reference. Confirm exact model applicability in the original material.