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CEL was on...now its off

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

Discussion summary

YOUR RESEARCHCEL was on...now its off

Reported or suspected cause

maf sensor, even though it was coding o2 sensors

Reported cause

No successful repair reported for this finding.

1
Identified cause
0
Suspected cause
0
Reported fixes
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 report identifying a cause
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.

Reported cause

I had an intermittent CEL and it turned out to be the MAF sensor, even though it was coding O2 sensors.

Original post Read captured discussion
CEL was on...now its off
Frequently discussed work

Replace maf sensor too

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

Be careful, if you go to the wrong tech, you may end up replacing all of the O2 sensors (like I did) and THEN having to replace the MAF sensor too.

Original post Read captured discussion
CEL was on...now its off
Read full discussion summary

Leading evidence: 'maf sensor, even though it was coding o2 sensors' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'maf sensor, even though it was coding o2 sensors' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Replace maf sensor too' (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 3 other evidence results

Replace maf sensor too

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

Be careful, if you go to the wrong tech, you may end up replacing all of the O2 sensors (like I did) and THEN having to replace the MAF sensor too.

Original post Read captured discussion
CEL was on...now its off

Replace of the o2 sensors (like i did)

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

Be careful, if you go to the wrong tech, you may end up replacing all of the O2 sensors (like I did) and THEN having to replace the MAF sensor too.

Original post Read captured discussion
CEL was on...now its off

Set off the cel

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

There are bunch of things that can set off the CEL and then turn it off again after so many cycles.

Original post Read captured discussion
CEL was on...now its off
Frequently discussed actions (3)

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

Replace maf sensor too

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

Be careful, if you go to the wrong tech, you may end up replacing all of the O2 sensors (like I did) and THEN having to replace the MAF sensor too.

Original post Read captured discussion
CEL was on...now its off

Replace of the o2 sensors (like i did)

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

Be careful, if you go to the wrong tech, you may end up replacing all of the O2 sensors (like I did) and THEN having to replace the MAF sensor too.

Original post Read captured discussion
CEL was on...now its off

Set off the cel

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

There are bunch of things that can set off the CEL and then turn it off again after so many cycles.

Original post Read captured discussion
CEL was on...now its off
Reported and suspected causes (1)

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

maf sensor, even though it was coding o2 sensors

No successful repair reported for this finding.

1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that report identifying a cause
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.

Reported cause

I had an intermittent CEL and it turned out to be the MAF sensor, even though it was coding O2 sensors.

Original post Read captured discussion
CEL was on...now its off
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.

  • Rennlist: 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: 20261026T183130Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Started the car couple days ago and noticed the CEL was on, car ran fine and detected no issue driving it. Told self to get the codes read before the weekend, started car this morning and now no CEL??? Is this common? Does it signify anything? still will get the codes read but was just wondering. The car is a 986, thought I would post here since the boxster forum is dead.

POST 2Original post

Its probably an 02 sensor or MAF sensor....The car sensed something not right, then turned the CEL on...on startup it did another check and at the time, there was no issue so it turned the light off....it'll be back on....I had a problem with the light coming on over and over again, I think it was an 02 sensor, and an exhaust leak...

POST 3Original post

could be a small evap leak, mine has done this in the past.

POST 4Original post

I had an intermittent CEL and it turned out to be the MAF sensor, even though it was coding O2 sensors. Be careful, if you go to the wrong tech, you may end up replacing all of the O2 sensors (like I did) and THEN having to replace the MAF sensor too. Ugly.

POST 5Original post

Yup. ..thats what happened to me....but I was under warranty so it didnt cost me....luckily....

POST 6Original post

Topping off the tank will cause it, as will a batch of bad gas...........sometimes it is simple things....

POST 7 / ORIGINAL POSTEROriginal post

Thanks all, kinda leaning towards bad gas! filled up at a random place few days before it came on. Still will have them read though.

POST 8Original post

I believe that a certain number of start up's(50?)without a fault will turn off the light. Read the code and you eill still see the fault.

POST 9Original post

There are bunch of things that can set off the CEL and then turn it off again after so many cycles. It would be interesting to hook an OBD2 reader up and see the history data to see what it was.

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