11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHO2 weird situation - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reported or suspected cause
wiring harness issue
Suggestion or failed attempt
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
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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 suspect a cause
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.
O2 weird situation - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'wiring harness issue' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'wiring harness issue' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check engine' (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.
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.
O2 weird situation - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check engine is off
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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 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
No leaks on the exhaust, the check engine is off but i don t get it why the ecu shows this error, specially the o2 is new.
O2 weird situation - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check with my scanner the values of the new o2
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
To give more details about this situation, when I finished mounting the new sensor, I started the car and I check with my scanner the values of the new o2.
O2 weird situation - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace sensor
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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 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 proceeded to change the sensor with a brand new Bosch part.
O2 weird situation - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check with my scanner the values of the new o2
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
To give more details about this situation, when I finished mounting the new sensor, I started the car and I check with my scanner the values of the new o2.
O2 weird situation - 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.
11 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: 20261026T203514Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hello, can someone please help me with a weird situation regarding an o2 sensor that is acting very strange
So, the story is this, about an year ago I bought a 986 from 99. Love the car but i had stored in the ecu an error: o2 ahead of cat bank 1 no signal. No check engine on the dash.
I proceeded to change the sensor with a brand new Bosch part. After installing the part i now get the error: 02 Sensor Ahead Of Cat. Conv., Cylinder (1-3) below limit value
No leaks on the exhaust, the check engine is off but i don t get it why the ecu shows this error, specially the o2 is new.
Could this be related to the fact that i have a Dansk Motorsport exhaust?
Thank you
Sorry, just edited the first post. The error i got now is 02 Sensor Ahead Of Cat. Conv., Cylinder (1-3) below limit value
To give more details about this situation, when I finished mounting the new sensor, I started the car and I check with my scanner the values of the new o2. The values were great, 0.2 -0,7.
Then after 10 minutes of driving, I checked again and the values are with minus (-0.1 - -0.3).
Again sorry, today i diagnosed the car with a different scanner. The error code is:
P1115 - Oxygen Sensor heating side 1 ahead of Cat - below lower threshold
