Octy 2 1.4TSI ESTATE CAXA

Quite uncertain where to enter this question. The keyfob#1 has started to cause serious problems with the car alarm system. So far keyfob#2 is working with no problem. Car alarm starting randomly and only disconnecting the battery helped. Yesterday the alarm kept sounding/flashing even when the engine was running - undrivable.

Is there a home cure whereby I can remap/reset the key fob? My very helpful auto sparks is unable to help

I would suggest that your problem is not with the key fob, but with the alarm system itself - if the fob is disengaging the immobiliser to allow the engine to start, this suggests to me that the fob is working correctly.

Disconnecting the vehicle battery should not stop the alarm, as it has a self-contained, internal battery.

Thank you Warrior183.

12 hours ago, Warrior193 said:

Disconnecting the vehicle battery should not stop the alarm,

as it has a self-contained, internal battery.

No does not make it stop, it will keep sounding till the battery of the alarm drained.

That's why there is a key hole in the side of the alarm's box and a set of 2 keys provided after the alarm installation.

I think that the battery inside the alarm is Li-ion and lasts many-many years.

^^^ & it has been in the car for 16 years now if the car is a 2010 Octavia which is 'many'.

Mine is in the alarm for 25 years and still working.

@D.FYLAKTOS Different alarm, in a different model and in a different environment / climate. So maybe someone with similar to the op in a similar location can comment on their alarm battery life. Not exactly an unknown issue!

Edited 3 hours ago3 hr by Evolution13

So it's time for a competition "who's alarm battery lasts longer from which brand-model and which location-enviroment temperature".

This will take some years to complete...