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Custom Exhaust causing engine light to go off? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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YOUR RESEARCHCustom Exhaust causing engine light to go off? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Check with the obii sensor it came out

Performed · outcome unconfirmed

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Reported fixes: 0
Unsuccessful attempts: 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.

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
WOW i got it checked with the obII sensor it came out with four codes
Original post Read captured discussion
Custom Exhaust causing engine light to go off? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Frequently discussed work

Check codes first

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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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
+1 on not the exhuast, Check your codes first then lets us know what it says.
Original post Read captured discussion
Custom Exhaust causing engine light to go off? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Read full discussion summary

Leading evidence: 'Check with the obii sensor it came out' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check codes first' (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 matching discussions · 10 captured posts examined · 0 partial discussions

Compare 3 other evidence results

Check codes first

Suggestion or failed attempt

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Reported fixes: 0
Unsuccessful attempts: 1
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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
+1 on not the exhuast, Check your codes first then lets us know what it says.
Original post Read captured discussion
Custom Exhaust causing engine light to go off? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check light has been caused by my custom magnaflow exhaust

Suggestion or failed attempt

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
So im starting to believe that the Engine Check Light has been caused by my custom magnaflow exhaust.
Original post Read captured discussion
Custom Exhaust causing engine light to go off? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check probably

Suggestion or failed attempt

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
Im going to go to Autozone and get it checked probably on Wednesday so ill get back to you guys with the code.
Original post Read captured discussion
Custom Exhaust causing engine light to go off? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Frequently discussed actions (4)

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

Check codes first

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
+1 on not the exhuast, Check your codes first then lets us know what it says.
Original post Read captured discussion
Custom Exhaust causing engine light to go off? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check light has been caused by my custom magnaflow exhaust

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
So im starting to believe that the Engine Check Light has been caused by my custom magnaflow exhaust.
Original post Read captured discussion
Custom Exhaust causing engine light to go off? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check probably

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
Im going to go to Autozone and get it checked probably on Wednesday so ill get back to you guys with the code.
Original post Read captured discussion
Custom Exhaust causing engine light to go off? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check with the obii sensor it came out

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
WOW i got it checked with the obII sensor it came out with four codes
Original post Read captured discussion
Custom Exhaust causing engine light to go off? - 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.

10 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: 20261026T130754Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hey! So im starting to believe that the Engine Check Light has been caused by my custom magnaflow exhaust. Anyone know if this can be true? if so anyway i can turn it off? I never touched the cats, only the mufflers. Thanks

POST 2Original post

i doubt its from the Exhaust, go get it scanned and see what the codes are.

POST 3Original post

+1 on not the exhuast, Check your codes first then lets us know what it says.

POST 4Original post

What does your custom exhaust consist of? If cat back only then it should not affect CEL. did you recently refuel your car? many CEL lights is triggered by the gas cap not being put back on tight enough otherwise get the fault code read and go from there.

POST 5 / ORIGINAL POSTEROriginal post

Im going to go to Autozone and get it checked probably on Wednesday so ill get back to you guys with the code. THANKS!!

POST 6 / ORIGINAL POSTEROriginal post

WOW i got it checked with the obII sensor it came out with four codes Here they are: p1126 p1128 p1130 p1133 CAN ANYONE HELP! THANKS !!

POST 7Original post

p1128 and p1130 are O2 Sensor codes if I remember right, just google the others but I think they are also o2 sensor. Check to make sure they are all hooked up, I doubt they would all crap out simultaneously. Also, you can get a good cheapo OBDII reader from Harbor Freight for $50, worth it!

POST 8Original post

Don't know what year you have but for me the 1128 and 1130 were vacuum leak codes that I think were related to a bad oil filler tube. I have a 2001 base model.

POST 9Original post

Boxster CEL Codes Looks like most are 02 sensor running rich codes.

POST 10 / ORIGINAL POSTEROriginal post

I got a custom MagnaFlow Exhaust, so do you think the back pressure is causing the o2 sensors to read errors???

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