Hi all. I’m a proud owner of a 2016 Škoda superb 190 2.0 tdi. Absolutely love it but I have an issue, my alarm keeps being triggered after locking the doors, usually within 3/4 mins of locking it.

I’ve connected it to VAG and nothing happening. No errors. No lash errors.

I’ve disabled the internal sensor yet still happening.

I’ve heard about the secondary alarm battery dying and also about the bonnet latches. However, the car doesn’t say the bonnet is opened, could it still be the latch?

Please need some urgent help!

Have you changed any of the interior lights to LEDs? This can cause all sorts of weird behaviour.

Nope. Everything is original on the car.

Have you had the starter battery tested? Battery voltage dropping below a certain threshold while vehicle is locked can activate alarm.

Suggest a good load test is done.

if it’s still on the original battery then it’s time to change

You’ve already got vcds so you can “code” the new battery in

Years ago I had an old Passat B5.5 an alarm would trigger on that and VCDS had a log to see what caused it, as yours is empty it’s likely the battery

So after leaving it parked up for 12 hours. I tested the battery with my multimeter and it read just over 12v. On crank it dropped to 10v for a split second but then above 12 so the battery seems to be fine. The battery was replaced by the previous seller, so it’s only a few months old. It’s from euro car parts.

It is quite possibly the Alarm Siren Battery needing replaced @ 10 years old. (It is actually an @5 years replacement item back when there were Service Books, pre 2012) So complete unit, or the battery if you can DIY.

1 hour ago, Shebby said:

So after leaving it parked up for 12 hours. I tested the battery with my multimeter and it read just over 12v. On crank it dropped to 10v for a split second but then above 12 so the battery seems to be fine. The battery was replaced by the previous seller, so it’s only a few months old. It’s from euro car parts.

At 'just over 12 volts' your battery SOC is only about 50%, I suggest that it needs to be recharged at the very least.

Do you know if the replacement battery was adapted (coded) correctly when it was fitted?

Edited 26 February26 Feb by Warrior193
question

@Shebby , did you get this resolved?

1 minute ago, Warrior193 said:

@Shebby , did you get this resolved?

Yes I did. Under the bonnet, near the wipers, there was the secondary alarm. Need to remove the wiper trim and it’s in the middle with one bolt. Disconnected it and the all works fine. I need to replace the part - which is around £30 for a used one but not had any time.