Hi,

I purchased my car in July with approximately 38,000 km on the odometer. Since then, it has been randomly exhibiting a persistent electronic fault.

The Problem

The issue manifests in two main ways:

1. Signpost Recognition Failure: A warning message appears stating that the signpost recognition system is not working.

2. Inaccurate Sat Nav Display: The built-in satellite navigation system throws up a random, incorrect map location (a minor inconvenience).

3. Critical Motorway Braking: On motorways, the car's adaptive cruise control system will spontaneously attempt to slow the car down drastically to a non-motorway speed limit it believes I should be adhering to. As the motorway speed limit in Ireland is 120 kph, this is both alarming and potentially dangerous, meaning I must completely switch off the cruise control feature.

Temporary Fix

The only thing that seems to clear the issue is stopping the car and leaving it parked for at least 30 minutes. This resets the system, and the fault will not reappear for a week or two, then randomly strike again without warning.

Dealership Response

I informed the dealership about this problem during the first service. They claimed to have checked the system thoroughly but were unable to reproduce the issue, and, therefore, the fault is still unresolved.

Has anyone else had experience with this specific fault and found a proper resolution?

Thanks.

 

Replace GPS Antenna

Thanks for the quick response,

Is this something covered by warranty?

For a 2024 I, yes.

See if there are any software updates; I had an Arteon with the speed limit recognition and had the same experience regularly on the motorway heading west on the M4 going under one of the Reading junction roundabouts where the car would randomly slow down to 60mph.

From what I could gather, the cruise control was linked to the satnav database, so if that’s incorrect then you get the problem.

I had an instance on a national speed limit road with cruise control on. It suddenly started to accelerate to an indicated/detected 80mph whilst heading towards a village! The database incorrectly showed an 80mph limit through the village, rather than 30mph!

One of the many OTA updates at one point did disconnect the cruise control from the speed limit recognition which instantly provided a fix to one of the many software problems with that tub of bolts!

I’ve had a similar issue to CubbyQ.

On the A417, going South from Birdlip, last Thursday evening, despite the road sign reading 60, the car slowed down to 40😳

There had only recently been long term road works in the area. My thinking is the sat nav (google maps on my iPhone 13) was giving the older info and overruled the sign reading software……🤷‍♂️

34 minutes ago, Trickiejohn said:

I’ve had a similar issue to CubbyQ.

On the A417, going South from Birdlip, last Thursday evening, despite the road sign reading 60, the car slowed down to 40😳

There had only recently been long term road works in the area. My thinking is the sat nav (google maps on my iPhone 13) was giving the older info and overruled the sign reading software……🤷‍♂️

Hah! you've been suffering the delays too then @Trickiejohn ! It'll be good when it's all finished...

I just think that the speed recognition is too clever for it's own good and too reliant on other inputs such as satnav.

I'm glad to be rid of it and just have 'normal' ACC in the Superb.

Was speaking to an old friend/ex-colleague the other day and apparently my successor is counting down the days to the lease ending on that Arteon - and he only started a few months ago!

Cheers,

Nick

Aerton……….. I was considering one of those, or a 5th Passat. The cost of the required spec put me off.

I hope the SE L Superb, will be as good as the Passat’s were (2 saloons and 2 estates) for less cash and more toys.

About 550 miles on the clock now, it drives very well, motorway, A or B roads. I’m finding the slightly higher driving position very nice and the headlights, just Superb (I do manually knock down to sidelights on B roads before they change automatically as there change late on bendy roads).

I’ve just about managed to set the massage seats to work without being distracting.

The DSG is nice and simple, Auto Hold didn’t work for the first few days but sorted itself out on a long run.

The only thing I turn off on Every run is the lane assist, and speed recognition on longer runs now.

John

You made a good choice avoiding the Arteon IMO.

It’s still one of the nicest looking ‘mainstream’ cars on the road, especially in Shooting brake guise, as I had it, but…

VW’s obsession with capacitive touch everything was just awful in reality…having it on the steering wheel was just absurd, especially with the cruise control/speed sign detection not working properly…it was all too easy to just brush across the controls when steering and activate cruise control, the heated wheel, etc. Just dangerous.

Physical buttons are what you need in car, so you can feel they’re there…

That does sound like a deal breaker to be honest.

The Superb is quite easy in that regard.

I occasionally still use the wrong L/H stalk to initiate the wipers, but I’ll have mastered that in a few more days I think.