Porsche Club GB

alarm problem

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Original source

2 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHalarm problem

Reported or suspected cause

diagnosed as the battery backup up siren (there

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
Basically, the problem was diagnosed as the battery backup up siren (there for not linked to ignition, indicators etc) and had an intermittent fauly caused by water ingress.
Original post Read captured discussion
alarm problem

Frequently discussed work

Check radio

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
Checked radio on someone advice and seems ok, tried unplugging siren next to battery but backup siren which i think is the high tone horn still sounds.
Original post Read captured discussion
alarm problem

Read full discussion summary

Leading evidence: 'diagnosed as the battery backup up siren (there' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'diagnosed as the battery backup up siren (there' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check radio' (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 · 2 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Check radio

Performed · outcome unconfirmed

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
Checked radio on someone advice and seems ok, tried unplugging siren next to battery but backup siren which i think is the high tone horn still sounds.
Original post Read captured discussion
alarm problem

Set alarm and it wouldn't go off

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
It's fine to drive and the siren doesn't go off when it's driven, and ocassionly i can set the alarm and it wouldn't go off for an hour or so.
Original post Read captured discussion
alarm problem

Frequently discussed actions (2)

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

Check radio

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
Checked radio on someone advice and seems ok, tried unplugging siren next to battery but backup siren which i think is the high tone horn still sounds.
Original post Read captured discussion
alarm problem

Set alarm and it wouldn't go off

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
It's fine to drive and the siren doesn't go off when it's driven, and ocassionly i can set the alarm and it wouldn't go off for an hour or so.
Original post Read captured discussion
alarm problem

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.

diagnosed as the battery backup up siren (there

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
Basically, the problem was diagnosed as the battery backup up siren (there for not linked to ignition, indicators etc) and had an intermittent fauly caused by water ingress.
Original post Read captured discussion
alarm problem

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.

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

Porsche Club GB: 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: 20261026T105141Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

hi, i've got a alarm problem on 1998 uk 996 C2 started a few weeks ago and i've tried but can't fix it. The alarm siren seems to go off for no apparent reason for a minute a a time then off but then straight off again. It's only the siren and not the flashers and the car can be started so the immobiliser is not getting activated. The only way to stop the alarm because the fob desn't turn the siren off is to take the negative battery lead off, however, normally you need the ignition on else the siren would go off but in this case without the key in the battery disconnection kills the siren. It's fine to drive and the siren doesn't go off when it's driven, and ocassionly i can set the alarm and it wouldn't go off for an hour or so. i've checked the normal doors, bonnet etc contacts and all seem ok and no obvious bleep as if something has been left open (have checked it open door and bleep does indicate open door). Checked radio on someone advice and seems ok, tried unplugging siren next to battery but backup siren which i think is the high tone horn still sounds. Someone also suggested locking and unlocking the car a few times then starting it up but seems to have no effect and not sure if there's a certain way of doing the locking and unlocking in a certain time frame. Tried looking through the workshop CD a have but 90 pages of alarm info and all dutch to me! can anyone help? mike

POST 2Original post

Hi Mike, Sounds like a similar problem I had on my 98 996 recently. The alarm wnet off and I couldnt disable it with the remote or the key. No lights and could drive it. Drove to OPC and it went off again and then stopped before I got to OPC. Basically, the problem was diagnosed as the battery backup up siren (there for not linked to ignition, indicators etc) and had an intermittent fauly caused by water ingress. All done under OPC warranty. Hope that helps Mike. Regards, Rob

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