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Dying at idle after o2 sensor replacement?

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Discussion summary

YOUR RESEARCHDying at idle after o2 sensor replacement?

Leading reported evidence

Replace upstream and downstream bank one o2 sensors

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No successful repair reported for this finding.

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Reported fixes: 0
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
Replaced both the upstream and downstream bank one O2 sensors on my C4S, after code P2096 came up.
Original post Read captured discussion
Dying at idle after o2 sensor replacement?

Frequently discussed work

Check any one of the post cat wires

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Suggestion
Also check any one of the post cat wires for DC voltage.
Original post Read captured discussion
Dying at idle after o2 sensor replacement?

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Leading evidence: 'Replace upstream and downstream bank one o2 sensors' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check any one of the post cat wires' (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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Check any one of the post cat wires

Suggestion or failed attempt

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Discussions that contain suggestions: 1

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Suggestion
Also check any one of the post cat wires for DC voltage.
Original post Read captured discussion
Dying at idle after o2 sensor replacement?

Check readings

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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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
OP - If you have a Durametric, Foxwell/Schwaben scanner, you should check the readings to find if the two are playing nice together.
Original post Read captured discussion
Dying at idle after o2 sensor replacement?

Reset computer

Suggestion or failed attempt

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Suggestion
U may want to disco the batery and reset the computer.
Original post Read captured discussion
Dying at idle after o2 sensor replacement?

Frequently discussed actions (4)

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Check any one of the post cat wires

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
Also check any one of the post cat wires for DC voltage.
Original post Read captured discussion
Dying at idle after o2 sensor replacement?

Check readings

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
OP - If you have a Durametric, Foxwell/Schwaben scanner, you should check the readings to find if the two are playing nice together.
Original post Read captured discussion
Dying at idle after o2 sensor replacement?

Replace upstream and downstream bank one o2 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
Replaced both the upstream and downstream bank one O2 sensors on my C4S, after code P2096 came up.
Original post Read captured discussion
Dying at idle after o2 sensor replacement?

Reset computer

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
U may want to disco the batery and reset the computer.
Original post Read captured discussion
Dying at idle after o2 sensor replacement?

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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

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Generation: 20261026T205155Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Replaced both the upstream and downstream bank one O2 sensors on my C4S, after code P2096 came up. I did the upstream sensor two days ago and had no issues. Did the downstream sensor today, and the car was shutting itself down after a rev to 3k. Then it'd shut down if I didn't give it a little throttle�wouldn't hold idle. This was after the car sat idling steady all the way to full temp with no issues. I had no issues with the upstream O2 sensor ( link to part from FCP Euro ), which appears to be OEM. I used this one , Bosch 0258006541, in the downstream position. I drove the car, and it seems fine now. Just wondering what the heck that was about!

POST 2Original post

U may want to disco the batery and reset the computer. Maybe the new sensor messed with the learned values. Also possible do and e-gas reset. Doubt its the issue but always good to do if having idle issues.

POST 3Original post

OP - If you have a Durametric, Foxwell/Schwaben scanner, you should check the readings to find if the two are playing nice together. The link below can get you pointed in the correct direction. Ahsai posted a lot about our vacuum and O2 systems through the years. At .44V the sensor is at 14.7. More is lean and less is rich. Also check any one of the post cat wires for DC voltage. https://rennlist.com/forums/showthre...errerid=184512

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