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O2 sensor resistance behind cat - Duramtric reading - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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YOUR RESEARCHO2 sensor resistance behind cat - Duramtric reading - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Clean maf and codes and they stayed away

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Unsuccessful attempts: 1
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Discussions that performed work without a confirmed outcome: 1

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Performed · outcome unconfirmed · Original poster
I cleaned the MAF and codes and they stayed away for one whole day but now the light came back on, although the car still runs smoothly.
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O2 sensor resistance behind cat - Duramtric reading - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Leading evidence: 'Clean maf and codes and they stayed away' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean maf and codes and they stayed away' (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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Replace before cat sensors a year ago

Suggestion or failed attempt

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Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion · Original poster
I did replace the before cat sensors a year ago.
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O2 sensor resistance behind cat - Duramtric reading - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Frequently discussed actions (2)

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Clean maf and codes and they stayed away

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
I cleaned the MAF and codes and they stayed away for one whole day but now the light came back on, although the car still runs smoothly.
Original post Read captured discussion
O2 sensor resistance behind cat - Duramtric reading - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace before cat sensors a year ago

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 did replace the before cat sensors a year ago.
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O2 sensor resistance behind cat - Duramtric reading - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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2 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

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Generation: 20261026T222516Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I was doing some diagnosis with a Durametric to solve my Engine light issue. Getting codes P1126 and P1133. In doing so I was looking at the o2 sensor resistance before and after the cats while idling. 3 of them read 0 and one on bank 2 after the cat read 64. Do they have to heat up for a while before giving a reading other than 0 or does the one with 64 mean there is an issue with that sensor? I cleaned the MAF and codes and they stayed away for one whole day but now the light came back on, although the car still runs smoothly. I did replace the before cat sensors a year ago.

POST 2Original post

From a thread you made. If it's not your O2 sensors, then it's most likely your MAF sensor. Fault code 1126 & 1133 - 986 Series (Boxster, Boxster S) - RennTech.org Forums

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