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O2 sensor issue - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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

Discussion summary

YOUR RESEARCHO2 sensor issue - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Replace oxygen sensors

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

have replaced O2 sensor twice ...

Original post Read captured discussion
O2 sensor issue - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed work

Check fuse(s)

No successful repair reported for this finding.

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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

I assume that you have checked the fuse(s)?

Original post Read captured discussion
O2 sensor issue - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary

Leading evidence: 'Replace oxygen sensors' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check fuse(s)' (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 · 9 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Check fuse(s)

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

I assume that you have checked the fuse(s)?

Original post Read captured discussion
O2 sensor issue - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check voltage

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 · Original poster

I'll have my guy check the voltage ...

Original post Read captured discussion
O2 sensor issue - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Disconnect batt

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

Easy part to replace, first disconnect batt.

Original post Read captured discussion
O2 sensor issue - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Disconnect sensor, do you see 12v at the connector

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 you disconnect the sensor, do you see 12V at the connector?

Original post Read captured discussion
O2 sensor issue - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed actions (6)

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

Check fuse(s)

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

I assume that you have checked the fuse(s)?

Original post Read captured discussion
O2 sensor issue - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check voltage

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

I'll have my guy check the voltage ...

Original post Read captured discussion
O2 sensor issue - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Disconnect batt

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

Easy part to replace, first disconnect batt.

Original post Read captured discussion
O2 sensor issue - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Disconnect sensor, do you see 12v at the connector

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 you disconnect the sensor, do you see 12V at the connector?

Original post Read captured discussion
O2 sensor issue - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace 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

Easy part to replace, first disconnect batt.

Original post Read captured discussion
O2 sensor issue - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace oxygen sensors

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

have replaced O2 sensor twice ...

Original post Read captured discussion
O2 sensor issue - 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.

9 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: 20261026T174436Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

have a 2004 base Boxster, 130K miles ... am getting a P0056 HO2S Heater Control Circuit and P0161 O2 Sensor Heater Circuit errors ... have replaced O2 sensor twice ... no joy ... could this be a wiring harness issue ? Thanks

POST 2Original post

I assume that you have checked the fuse(s)? If you disconnect the sensor, do you see 12V at the connector?

POST 3 / ORIGINAL POSTEROriginal post

Quotes source post: 654090

fuse is good ... I'll have my guy check the voltage ... Thanks

POST 4Original post

Fuse is visually good or actually checks out as good with a meter? Cheap to replace if it hasn’t been.

POST 5 / ORIGINAL POSTEROriginal post

Quotes source post: 654111

fuse also handles injector circuit ... car won't run if fuse pulled ... fuse is good ...

POST 6Original post

Had the same problem codes thinking it will go away with new OS, but did not. Had to buy a new Water Temperature Sensor 99660641000. Easy part to replace, first disconnect batt. Water temp sensor its located on the oil pump. Clear codes at the end. Since then had no code issues. Hope it works for you. Good luck.

POST 8 / ORIGINAL POSTEROriginal post

Quotes source post: 654248

A NTK 25727 from Rock Auto ...

POST 9Original post

This would be the post cat on the drivers side. Is that what you replaced?

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