PetrolDave

So module 09 is seeing the ignition switched terminal as unswitched. I would check against a wiring diagram where module 09 gets its ignition switched feed(s) (there may be more than 1) from and get tracing with a multimeter.

It's not only a rain sensor it's also the light sensor for auto lights. So you can have an auto lights only sensor, or a combined auto lights and wipers sensor (and there are 2 versions of that, one which allows auto window closing when it rains and one that doesn't) - confusing it most certainly is! Do you have auto lights?

Me too from the part numbers.

It depends on whether yours is an early 2015 build or a late one, early builds have a MIB1 infotainment system which doesn't support CarPlay or Android Auto - my previous 15 reg Octavia had a MIB1 - later 2015 builds have a MIB2 which does support CarPlay and Android Auto.

When start/stop doesn't work it's always worth checking the infotainment screen that gives an explanation why it isn't working - things like aircon, electrical load, etc.

The advice re timing belt is much longer than 5 years, so no you do not need to replace the timing belt unless you have done over 100,000km. Water pump changing on the 1.4/1.5 engines doesn't have a schedule, just replace when faulty or the belt is sowing signs of wear when visually inspected.

Firmware won't solve it, but there are people and tools that can enable some additional features (such as CarPlay & AndroidAuto) - I'm not one of those people!

Have you asked in the Octavia Mk4 forum? The Mk3 and Mk4 have quite deiferent electronics.

What features do you want to enable, some need a FeC code not just a software update.

Cost and availability at the time of production - even Audi do this, it's not a "Skoda thing".

USB Aux or 3.5mm audio only Aux?

You'll get far better (any?) response by posting in English - which is the official language of this forum.

They're all shown as intermittent which means the faults weren't present when the scan was done but were historical.

But if ODIS says there's no updates then the dealer will say it's up-to-date even if the car has known issues (like the climatronic sync issue you mention). This is what puts me off moving to a Mk4 - getting the firmware (and in a few cases on older Mk4's hardware) on several modules updated isn't as simple as it should be because Skoda don't acknowledge all the issues.

IIRC this was mentioned on here a few years ago as happening when the tank is about 3/4 full due to there not being any/enough baffles in the tank.

Check for binding brakes or failing bearing on front right wheel.

Based on my several times a day browsing the Octavia 3 and 4 forums, personally I'd look for a FL Mark 3 first.

Leave the key in the ignition and don't open the door?

With VCDS it shows modules that are SFD locked when you do a scan, I don't use OBDeleven so can't comment on whether that indicates SFD locked modules in a scan.

OBDeleven or VCDS, provided the airbag module isn't SFD locked.

On any Skoda with a Battery Management System you must always connect the negative lead of an external charger to the chassis NOT the battery negative terminal. If you connect it to the battery negative terminal the Battery Management System won't know the battery has been charged.

15 reg means it's an Octavia 3, so please post in the Octavia 3 forum where fellow owners can offer good advice.

It's the most common place for car manufacturers to mount tweeters, as high frequency sound is very directional and they don't want it to get absorbed by legs/clothing/etc. plus the theory is that if the sound appears to come from the windscreen then a drowsy driver is more likely to stay looking ahead rather than down.

Especially in countries that still generate a lot of their electricity by burning fossil fuels, most notably China which consumes over 50% of world coal. Coal Consumption by Country

Do you mean ECU? When you titled this thread ICU I assumed you meant some kind of reference to getting your Yeti working again without needing to go to the car equivalent of an Intensive Care Unit! The ECU and instruments will need matching to the new keys, which isn't a job that normal diagnostic software can do, it usually needs a dealer-level piece of software such as ODIS.