PistonHeads

Battery issue - Page 1 - Boxster/Cayman - PistonHeads UK

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Original source

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHBattery issue - Page 1 - Boxster/Cayman - PistonHeads UK

Leading reported evidence

Use car

Performed · outcome unconfirmed

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 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
today after not having used the car for just 3 days the alarm started and the car wouldn't start - also the windows dropped a couple of inches.
Original post Read captured discussion
Battery issue - Page 1 - Boxster/Cayman - PistonHeads UK

Frequently discussed work

Check carpet

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
Couple of other possibilities - check carpet under passenger seat for any signs of dampness as this is where the ECU lives and will cause these kind of problems if it gets wet.
Original post Read captured discussion
Battery issue - Page 1 - Boxster/Cayman - PistonHeads UK

Read full discussion summary

Leading evidence: 'Use car' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check carpet' (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 · 4 captured posts examined · 1 partial discussions

Compare 3 other evidence results

Check carpet

Suggestion or failed attempt

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
Couple of other possibilities - check carpet under passenger seat for any signs of dampness as this is where the ECU lives and will cause these kind of problems if it gets wet.
Original post Read captured discussion
Battery issue - Page 1 - Boxster/Cayman - PistonHeads UK

Check earth strap

Suggestion or failed attempt

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
The alternator was changed in March 2014 and the battery in Nov so hopefully it was a one off that caused the problem - I have checked the earth strap and that is well secured with no corrosion.
Original post Read captured discussion
Battery issue - Page 1 - Boxster/Cayman - PistonHeads UK

Use i can leave my other cars

Suggestion or failed attempt

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
My question is why would the battery be flat after only 3 days of not being used-I can leave my other cars for 3 weeks !!
Original post Read captured discussion
Battery issue - Page 1 - Boxster/Cayman - PistonHeads UK

Frequently discussed actions (4)

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

Check carpet

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
Couple of other possibilities - check carpet under passenger seat for any signs of dampness as this is where the ECU lives and will cause these kind of problems if it gets wet.
Original post Read captured discussion
Battery issue - Page 1 - Boxster/Cayman - PistonHeads UK

Check earth strap

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
The alternator was changed in March 2014 and the battery in Nov so hopefully it was a one off that caused the problem - I have checked the earth strap and that is well secured with no corrosion.
Original post Read captured discussion
Battery issue - Page 1 - Boxster/Cayman - PistonHeads UK

Use car

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
today after not having used the car for just 3 days the alarm started and the car wouldn't start - also the windows dropped a couple of inches.
Original post Read captured discussion
Battery issue - Page 1 - Boxster/Cayman - PistonHeads UK

Use i can leave my other cars

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
My question is why would the battery be flat after only 3 days of not being used-I can leave my other cars for 3 weeks !!
Original post Read captured discussion
Battery issue - Page 1 - Boxster/Cayman - PistonHeads UK

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.

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

PistonHeads: 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: 20261026T161109Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

During November the battery in my 986 Boxster S (2004) failed so I bought a replacement from porsche - today after not having used the car for just 3 days the alarm started and the car wouldn't start - also the windows dropped a couple of inches. I now have it on charge so hopefully all will reset and be ok - My question is why would the battery be flat after only 3 days of not being used-I can leave my other cars for 3 weeks !! thanks for any help.

POST 2Original post

The Boxster should be good for around 2 weeks if you didn't leave something on when you parked it. Did you measure the battery voltage before you put it on charge?

POST 3 / ORIGINAL POSTEROriginal post

I didn't measure the voltage - oops ! The car started fine this morning and I took the long way to work to give it a run , and the weather is nice - The alternator was changed in March 2014 and the battery in Nov so hopefully it was a one off that caused the problem - I have checked the earth strap and that is well secured with no corrosion.

POST 4Original post

Couple of other possibilities - check carpet under passenger seat for any signs of dampness as this is where the ECU lives and will cause these kind of problems if it gets wet. Also, a failing ignition switch will also cause these gremlins and very common to fail on the 986

This is a source reference. Confirm exact model applicability in the original material.