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Old 05-02-2009, 12:14 PM   #1
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Stock alarm keeps going off for no reason!

My stock alarm on my 01 box s has beeN acting up lately foR no reason the alarm will go off at least once a week, anyone know why?

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Old 05-02-2009, 09:50 PM   #2
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I had the same problem.. at first i thought it was my aftermarket radio i installed. The reason i thought that was the stock one has a wire which is attached to it so that if the radio is being stolen it sets off the alarm i think or something to with the alarm. After determining that wasn't the cause of the alarm going off . Well then I went on to thinking the battery was not recharging enough and that it was dipping below and then shooting up making the car charging/alarm system inconsistent making it going off cause it did not a constant charge. Well I bought a new battery optima red cap .. The same day the car alarm went off at 3 AM.. My neighbors really loved me I mean really did..lol .. Well after doing all this I asked my friend who works for Porsche and he said for me to have my alternator tested at autozone. So with that I did and well let's just say that I bought a new alternator (bosch) from partswarehouse.com it was 365.00 which included a 108.00 core charge. It has been 2 mths and not once has the alarm gone off .. so that was the problem in mine. So it worth a try to get your alternator tested .. let me know if that helped you out.

Last edited by clb0099; 05-03-2009 at 07:40 PM.
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Old 05-08-2009, 03:19 PM   #3
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I got my battery and altenator tested and it read "13.77v with loads off" apparently those are good results.... Is it?

Alarming still acting up!
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Old 05-09-2009, 07:07 PM   #4
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Sometimes moths or other bugs can set it off.
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Old 05-10-2009, 08:16 AM   #5
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You need to have the event history of the alarm system read by someone who has a PST-2. It will tell you exactly what set off the alarm.

1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster bought new. Installed used motor at 89k.
1987 924S. 2002 996TT. PST2
Owned and repaired Porsches since 1974. Have driven them all the way the Dr intended...
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