EU/UK: Ongoing navigation issues

[ferdiaz]

To be honest, that's what all these 60 pages are. Speculation. A bit more on top won't do no harm.

There's no official communication on the issue: this renders EVERY statement as speculative. End of the discussion.

It does not matter if there's an effort at inferring any kind of conclusion from half facts and biased observations based on what is read in reddit, taycanforum and 9ff. It all amounts to the same kind of speculative-grade arguments.

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[Jasper4S]

There are some facts:
- multiple dealers shared info about a June update
- multiple forum members got info from Porsche Connect that engineers are working on the issue
- multiple forum members got a new PCM that solved the issue. There is one case were the issue came back.

 

[chun]

Could be true, but why;
- did they release 3885 for minor issues. You can only get it if you complain enough.

Same reason they released 4405 as an update to 4360, if you complain enough. Stability improvements, mainly to do with pcm stuck at porsche taycan logo.

Could be true, but why;
- are they accepting costs of loaners from all Porsche Centers that are helping us right now.

No, loaners are part of the service offered by each dealership. They manage the loaners, it's not managed by porsche central.

Could be true, but why;
- are they approving PCM replacements to check if it mitigates the issue

Because, at least for leasing, you can ask them to take the car back if they can't provide an appropriate fix or at least try.

Could be true, but why;
- did they release multiple small patches past 6 months to try to solve it

Can you list them? I have none of those patches, neither do any of the dealerships in switzerland.
Are you refering to the map updates? They have been sent on a monthly basis since 2020. Nothing new.

Could be true, but why;
- did they introduce this bug through an OTA. A recall + visit should not be needed

What is this OTA update you speak of? As it's been noted, for many people, the issue exists since before the battery monitoring software OTA update. So which other OTA update?

 

[chun]

- multiple forum members got a new PCM that solved the issue. There is one case were the issue came back.

You and who else?
My issue was also solved by 3885 + ecu updates, for 4000 km, after which it returned. Then they reset my car to default settings, which also fixed my car... for 600km.

There are 2 cases on the german forum of pcm replacement and issue returning, and 1 in this thread.

For you it's been 300km, per your words. Let's give it some more driving time, no?

As for the other statements, what else do you expect them to say? "We're not actually working on it, in fact there isn't even a budget allocated yet"? As a matter of fact, most dealers did say something along those lines... aka "huh... never seen this problem before". And there were in fact dealers saying that a pcm replacement will not fix it, so which dealer is right?

 

[prj]

Could be true, but why;
- did they release 3885 for minor issues. You can only get it if you complain enough.
- are they accepting costs of loaners from all Porsche Centers that are helping us right now.
- are they approving PCM replacements to check if it mitigates the issue
- did they release multiple small patches past 6 months to try to solve it
- did they introduce this bug through an OTA. A recall + visit should not be needed

you are speculating like the rest but you state it like facts. Could do more harm than needed

I never claimed that they are not trying to fix it, I just told you why it is not being fixed in a timely manner.

As to point by point:

- did they release 3885 for minor issues. You can only get it if you complain enough.

This was done a while back, and not in response to the navigation crashing afaik. 3885 is fairly old.

- are they accepting costs of loaners from all Porsche Centers that are helping us right now.
- are they approving PCM replacements to check if it mitigates the issue

Epic fail powered by cariad
New PCM solves nothing, it just clears the cache and all the settings, and it shits itself after a while again.

- did they release multiple small patches past 6 months to try to solve it

There has been no software updates for the PCM. It's 3885 and that's it. Map updates are not going to fix it.

- did they introduce this bug through an OTA. A recall + visit should not be needed

It was not introduced through an OTA. The reason is too many charge points for the badly coded navigation system.
This was completely fixed in 4360. The solution is to create a 4360 style branch for J1.1 and then update all the older PCM's to it.
The problem is:
a) They can't just change different menus, because the owner's manual is no longer current then, so that would have to be updated.
b) Such a recall is insanely expensive, also because the PCM updates have a risk of bricking the PCM. They already have experience with that during the uPdate, and it most likely cost an obscene amount of money, but times were different then.
c) They probably want people to buy J1.2 for the updated PCM look & feel.
d) Porsche's financial situation is a disaster right now and they are in full survival mode. Fixing old cars where most of them are out of warranty by now is just not a high priority for them.

Will it be fixed? Most likely. Will it be fixed in a timely manner? Not unless it starts crashing in the USA as well and the NHTSA gets involved.

 

[Leccy61]

What a mess it is. Introducing new features seems like something they don’t do, but adding manual battery preconditioning would help owners out. Other VAG EVs have it so it’s not like it’s an unknown concept for them.

 

[Jasper4S]

For me, preconditioning never stopped working. I 'only' had navigation freezes and sometimes crashes. Is that another problem on top of the crashes?

@chun I remember you had issues with batteries not stopping to precondition. Seems like the other way around. Is that problem related to the nav crashes too?

 

[Leccy61]

@Jasper4S I’m coming from the angle that using the Porsche nav and charge planning as intended includes pre conditioning but when it crashes everything goes out of the window.

Obviously you can work around that by turning the charge planner off so the nav works without crashing, do the charge planning yourself and set the porsche nav to navigate to the chargers one by one In which case pre conditioning will happen.

However, if we had manual pre conditioning you could use something like CarPlay/ABRP and when you’re 20 mins from next charger initiate pre conditioning yourself. Obviously you lose integration of the navigation into the binnacle or HUD, but it would be another option.

 

[okkotonushi]

@Jasper4S I’m coming from the angle that using the Porsche nav and charge planning as intended includes pre conditioning but when it crashes everything goes out of the window.

Obviously you can work around that by turning the charge planner off so the nav works without crashing, do the charge planning yourself and set the porsche nav to navigate to the chargers one by one In which case pre conditioning will happen.

However, if we had manual pre conditioning you could use something like CarPlay/ABRP and when you’re 20 mins from next charger initiate pre conditioning yourself. Obviously you lose integration of the navigation into the binnacle or HUD, but it would be another option.

Exactly what i meant and how i‘m doing it

 

[Papi95]

Hello everyone, following my visit to the Porsche dealership to resolve the navigation issue, an update to version 3885 was performed. Everything worked fine for 200 km, but unfortunately, the navigation system started crashing again. I filmed the crash and sent the video to the dealership.

 

[chun]

For me, preconditioning never stopped working. I 'only' had navigation freezes and sometimes crashes. Is that another problem on top of the crashes?

@chun I remember you had issues with batteries not stopping to precondition. Seems like the other way around. Is that problem related to the nav crashes too?

Yes, I’ve had it and still have it both ways.
When the map crashes/reloads eventually, there’s a chance that preconditioning stops until I restart the car… or that it remains on forever until the car is restarted.

It has happened 3 times for preconditioning to keep going forever, all of them on long trips, and always after a crash/reset of the map with the blue loading circle.
For preconditioning to stop and not start until a car restart, this has happened a lot more - didn’t exactly keep track.

 

[okkotonushi]

How can you check if pre conditioning is still on?

 

[ferdiaz]

How can you check if pre conditioning is still on?

I saw my battery reaching 50 degrees while cruising the french autoroute at 0°C outside.

 

[Bennachie]

Interestingly 4 or 5 years ago, my Macan S experienced similar issues to this. Nav crashing (no charge planning of course - 3 litre ICE) and all on line services disappearing.

The vehicle was out of warranty but I contacted Porsche and a discussion ensued for a number of weeks and they agreed to replace the PCM for free and I would have to pay a small fee for fitting - a very good deal actually, but they could not guarantee a fix.

The 'ticket' indicated that work was ongoing at the Porsche end to investigate...

However, I was convinced the PCM was not at fault and soldiered on for 6 months as I did not want my car taken apart. I continued to 'suggest' it was a back end problem as the dialogue continued.

Month 7, on a longish journey away from home and all service resumed. Perfect, no issues from then on.
Porsche UK apologetic and offered a goodwill gesture but no explanation.

Probably not linked as an older generation of PCM and an ICE car BUT a similar issue which was back end and was resolved at server level.

I don't know if my instance was a one off or part of a wider issue.

Hope this is not a poisson rouge.

 

[Dabz]

Didn’t crash once.

Every trip since June 2025, especially on this journey which I do twice a month, has been a navigation disaster. Today, having lost LTE and using the guest login after a PCM reset I just did a 2.5hr journey with not a single crash.

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