Planet-9

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7 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

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Leading reported evidence

Reset codes myself

Suggestion or failed attempt

No successful repair reported for this finding.

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Unsuccessful attempts: 1
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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

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Suggestion
Now I read and reset the codes myself.
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Leading evidence: 'Reset codes myself' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Reset codes myself' (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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1 matching discussions · 7 captured posts examined · 1 partial discussions

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Run trickle charger in winter

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that contain suggestions: 1

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Suggestion
that is at a lower than spec voltage (yes I usually am running a trickle charger in winter but not always as I move it from vehicle A to B, etc.).
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Frequently discussed actions (2)

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Reset codes myself

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
Now I read and reset the codes myself.
Original post Read captured discussion
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Run trickle charger in winter

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
that is at a lower than spec voltage (yes I usually am running a trickle charger in winter but not always as I move it from vehicle A to B, etc.).
Original post Read captured discussion
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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.

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

Planet-9: 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: 20261026T135432Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

I know this has been a topic over the years but try this scenario. I have a 2006 CaymanS I bought new. 28k miles. Never a problem at all. I have done most of the service except the belts. It sleeps for months during the winter. I start it every week or so. When it's time to take it out in the Spring the CEL has come on almost every time. This gets stored in the computer and will result in a fail on inspection. So I take it to the dealer and they reset. Drive 100+ miles for the computer to reset and then go get an inspection. All is well for many months. Finally I got sick of the dealer charges and bought an OBD reader-Blue Driver. Now I read and reset the codes myself. And the causes are cylinder 1 and 6 misfire which I believe have to do with a battery that is at a lower than spec voltage (yes I usually am running a trickle charger in winter but not always as I move it from vehicle A to B, etc.). Wondering if anyone can verify my low battery theory. Thanks.

POST 2Original post

I would think the problem would be the ignition coil packs - others have reported corrosion in the humid areas. Mine look fine in Los Angeles.

POST 3Original post

I've looked at all of the coil packs. Clean and not cracked!

POST 4Original post

Do you just start the car for awhile, let it idle and then turn it off during the winter? I've read before that's not recommended but haven't verified that myself in the owner's manual, still just a thought that maybe in some way that could be contributing to the problem?

POST 5Original post

Good point. Pretty sure my manual says, start it and drive. No warm up. 2008 S. Sort of seems wrong to me.

POST 6Original post

Archer911, I would guess your theory about low battery voltage is probably correct given that you only get the CEL at first start in Spring. With that said, I wouldn't think idling on occasion is necessarily the best thing for the motor over the winter months. I would either put it up for winter per winter storage procedures or drive it on occasion to get everything warmed up/flowing. I do the latter and have had no issues. Good luck! -Moto

POST 7Original post

MotoFanatic: I wish I could drive the Cayman in the winter months but the roads here are covered in salt and often icy and with temps well below tire rubber operating ranges I'd be hard pressed to stop in a hurry or corner in a skillful fashion. What do all the car dealers do if idling and moving a car causes constant CEL lights to go on? I'm pretty sure the CEL light has always been due to a dying or undercharged battery . Hopefully our posts will help out a Cayman owner in the future.

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