Morning,

 

I have searched around for this issue over the last few weeks as my alarm seems to just randomly trigger recently. Funnily enough it doesn't when i disable the internal sensors using the button on the column with the drivers seat belt. Some days it does, some it doesn't. Which is why i'm kind of confused as to what i need to check. Is it a sensor issue? An alarm battery issue? I don't know. Has anyone had this issue? and seemingly fixed it when disabling the internal sensor?

 

What kind of things can trigger it? Because silly enough i'm almost certain a fly was left in my car last night and it was set off within 30 seconds of me leaving my car (forgot to disable internal sensors). I don't know if that would, or if its just starting to drive me mad.

 

If it's any consolation?? My Octavia has had the same problem since I got it nine years ago!!

I've never concerned myself about it but if I'm away I disable internal sensors.

I keep spare key fob handy at night, incase it goes off whilst I'm in bed Zzzz!!

I have had a daddy long legs and a fly set mine off in the past. 

It's so irritating! I read somewhere that it could be the internal battery or something. But no one ever says if it actually sorts it! You can remove the fuse to disable interal alarms permanently right? Anyone know which

2 hours ago, Norco said:

I have had a daddy long legs and a fly set mine off in the past. 

I laughed at this for some reason.

If you have access to VCDS you can interrogate the car to tell you what has triggered the alarm the last few times it has gone off. My car (2010 registered) has started doing it, VCDS shows it as the alarm siren as the trigger. This is the internal back up battery starting to fail so a new siren is needed. Skoda reckon on around 6 years for the life of the battery in the siren. I have ordered a replacement from aliexpress 

On 12/11/2018 at 16:18, dilksie said:

If you have access to VCDS you can interrogate the car to tell you what has triggered the alarm the last few times it has gone off. My car (2010 registered) has started doing it, VCDS shows it as the alarm siren as the trigger. This is the internal back up battery starting to fail so a new siren is needed. Skoda reckon on around 6 years for the life of the battery in the siren. I have ordered a replacement from aliexpress 

 

You can change the battery if you can find one. See my recent post about it.

On 12/11/2018 at 16:18, dilksie said:

If you have access to VCDS you can interrogate the car to tell you what has triggered the alarm the last few times it has gone off. My car (2010 registered) has started doing it, VCDS shows it as the alarm siren as the trigger. This is the internal back up battery starting to fail so a new siren is needed. Skoda reckon on around 6 years for the life of the battery in the siren. I have ordered a replacement from aliexpress 

What does VCDS involve? Can i just buy a unit for it? I have a OBDII reader is it? That doesn't come up with anything. Can you change the siren battery? I thought it was a sealed unit

Make sure the ultrasonic emitter/detector grilles on the ceiling spectacle storage/light assembly are free of dust by vacuuming and don't decorate the interior with hanging furry dice etc that could move by air flow through the ventilation system.

 

Ensure window and door seals are clean/good fitting and windows fully closed to eliminate wind entry.

 

If nuisance alarm triggers still occur try setting the ventilation system to recirculation mode before you lock up and see if it makes a difference.

20 minutes ago, SimpsonMrG said:

What does VCDS involve? Can i just buy a unit for it? I have a OBDII reader is it? That doesn't come up with anything. Can you change the siren battery? I thought it was a sealed unit

 

You need a lead and download software.

 

Ot find someone local on the VCDS map who will plug it in for you.

 

This is by far the best method for tracking down alarm triggers.

6 minutes ago, MicMac said:

If nuisance alarm triggers still occur try setting the ventilation system to recirculation mode before you lock up and see if it makes a difference.

 

It should do that automatically anyway when you turn the ignition off.

4 hours ago, SimpsonMrG said:

What does VCDS involve? Can i just buy a unit for it? I have a OBDII reader is it? That doesn't come up with anything. Can you change the siren battery? I thought it was a sealed unit

 

VCDS is a laptop based program that gives you almost dealer level diagnostics for VAG cars. The software is free to download but you need a lead from the manufactures Ross Tech for it to work. There are clone cables available but they are not recommended for use. Your OBDII reader will only access the OBDII parameters in the engine, so no use for the alarm which will come under the body control module. Like it has been suggested have a look on this site for a member who is local to you and offers a VCDS scanning service. In regards to the alarm unit being sealed, yes they are but there is plenty of information on this site about changing the battery including a recent thread in this forum by FatblokeVRS