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Alarm/Central Locking

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Hanbury911

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My 2001 996 seems to have developed a problem. I last drove the car last Saturday and it has not been touched since. I think I set the alarm so that the internal sensors were switched off (pressed the fob twice and the horn beeped once). I went to it this morning and car had gone into stand by mode and I had to unlock the car using the key. After about 10 secs and before I could start the ignition the alarm beeped and then the siren went off. I stopped it by pressing the fob no problem, started the engine and drove off. When I got back and I tried to lock the car normally (one press) it locked fine but the alarm beeped twice. I unlocked it with no problems, no beeps etc. I locked it again and the same thing happened, it locked but beeped twice. I also tried to lock it by pressing the fob twice and it seemed to lock and then unlock. I have checked all the sensors (doors, front and rear lid, middle luggage compartment) and they are all closed. I did have a a CD changer fitted a couple of weeks ago but I have drove it many times last week with no issues. There is a very good chance that I am doing something stupid or wrong but I am not sure what that is!! Any help would be much appreciated.
 
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Tim

When the car is locked, check the LED on the centre of the dash. Once it has settled down (10 seconds or so) see if it single-flashes every 2 seconds or double-flashes. A double-flash means that there is a system fault, and you need to get it plugged in to a Porsche tester to tell you whats wrong. I would suspect it is one of the door lock microswitches has stuck, but a diagnostic test will show what the problem is.
 
Thanks Richard, The LED's are flashing every 2 secs or so but went to an Indie yesterday and had it plugged in. It came back as having an Interior Sensor fault (amongst other minor issuse such as the alarm being activated several times etc) but the guy at the garage was concerned because he was unable to reset any of the faults from his computer. He thinks maybe that replacing the sensor would not solve the problem and that there maybe another underlying reason. Any thoughts?
 
With mine it was the door locks (as Richard highlighted) but I would have thought that the diagnostic test would have picked that up?
 

ORIGINAL: Hanbury911

Thanks Richard, The LED's are flashing every 2 secs or so but went to an Indie yesterday and had it plugged in. It came back as having an Interior Sensor fault (amongst other minor issuse such as the alarm being activated several times etc) but the guy at the garage was concerned because he was unable to reset any of the faults from his computer. He thinks maybe that replacing the sensor would not solve the problem and that there maybe another underlying reason. Any thoughts?
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Sometimes you have to replace the faulty component before it will allow you to reset the fault register, depending on whether the fault is intermittent or present all the time. If it shows a faulty sensor, then I would replace it. They are £80.11+VAT, and fairly easy to change - mounted in the overhead lights.
 
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