I think I've got a problem with my brakes, the dealer doesn't. Help please!

[BigBob]

My brakes have started behaving strangely after the car has been parked up overnight (ie more than 6 hours). My understanding is (and what the car manual says) is that the recuperation braking is deactivated for a 'short time' to clean the brakes, thereafter the recuperation braking is activated. That's what my car has done for last 3 years until recently.
Now my car starts up with recuperation braking activated, then after a few brake pedal pushes (while driving) it will deactivate, then it activates again, then deactivates etc usually for a few miles. You can see this from the green recuperation bar and feel the difference when pressing the brake pedal.

The dealership's service department think my brakes are doing what they are supposed to, and their behaviour is the same as another taycan they have. They think this new braking behaviour may be as a result of an upgrade/recall from a few months ago and that the online manual (on app) may be out of date because of it. I'm not convinced and the current operation is disconcerting to say the least given different brake pedal pressure required to slow the car and I can't see why porsche would push this change out.

Appreciate it if you could respond to the poll and please let me know if you had the same issues and if so what the fix was. The greater the number of responses will add weight to my discussions with the dealership's technicians.

Thanks.

1 minute video of what mine is doing presently:
https://youtube.com/shorts/kXGdd89IoFM

Sponsored

 

[cityhpper]

Strange.
Both my previous CT4 and my current GTS ST behaves as explained in the user manual i.e according your second option in the poll.

 

[gtm]

J1.1 working as per the manual. No regen braking after sitting overnight. One or two decent applications of the brakes and regen braking kicks in and stay active until parked overnight again. However no software updates in the past 5 months.

Wanted to add that my pedal feel is very consistent whether mechanical braking or regen braking. WPK0 service campaign completely transformed my brakes and they have been very consistent since.

 

[FlyingPoint]

Two Taycan's in and the brakes work as per the manual and your second vote option.

 

[hifi239]

My car falls in between your options! After sitting overnight, I get the regen green for the first block of driving, then it goes into clean mode, then regen for the rest of the day.

 

[Dabz]

Now you mention it…I leave the driveway and have regen through the village. Then regen stops when I pick up speed and the first major braking at crossroads is mechanical braking cleaning the disks, which continues down the next hill after the next faster section of driving. By the time I get to the office and back in a 30 zone (about 3 mile total drive) regen is back on again

 

[chun]

j1.1 2020 turbo, no regen, just mechinal after long parking. Which annoys me, as the brakes squeak a lot getting out of the parkspace...

 

[Tay Chi]

My brakes got messed up in a different way recently. There is a hissing friction sound at low speeds (around 5mph) and towards the very end of braking (when getting close to 0mph)

First check by dealership said nothing wrong. But there is no way the noise is normal. Will be scheduling another appointment.

Anyone gets that issue?

 

[WuffvonTrips]

I don't know which option applies to me- since the recall (last year?) to tweak brake behaviour I've not been conscious of regen v mechanical braking, the pedal always feels so consistent. If you're experiencing inconsistent feel (especially at the moderate pressures in your video), something's not operating correctly, regardless of whether regen is indicated.

 

[BigBob]

I don't know which option applies to me- since the recall (last year?) to tweak brake behaviour I've not been conscious of regen v mechanical braking, the pedal always feels so consistent. If you're experiencing inconsistent feel (especially at the moderate pressures in your video), something's not operating correctly, regardless of whether regen is indicated.

Brake blending is perfect once the car has been going for a while. The issue at start up is, you don’t know if your going to get recup (ie blended) braking or just mechanical. Thats where the different/unpredicatable pedal pressure problem arises.

 

[WuffvonTrips]

Brake blending is perfect once the car has been going for a while. The issue at start up is, you don’t know if your going to get recup (ie blended) braking or just mechanical. Thats where the different/unpredicatable pedal pressure problem arises.

Even for a brief initial period of a journey, there shouldn't be any inconsistency of pedal feel, so I think you have an additional issue to that of the unpredictable deployment of regen (though possibly they're different symptoms of the same underlying fault).

 

[f1eng]

My car falls in between your options! After sitting overnight, I get the regen green for the first block of driving, then it goes into clean mode, then regen for the rest of the day.

Mine is like this.
I had assumed the reset after overnight wasn't immediately happening. It seems to have been like this since my service in January when there was definitely some software shenanigans.
My blind spot warning doesn't work since then either and can't be switched on either because it no longer shows up on the list of assistance items one can switch on and off from the PCM.
I can still alter the brightness of the LEDs but they never come on apart from when adjusting the brigtness.
It is all a bit annoying and I must say something to the dealer about it but since I avoid motorways as much as possible nowadays it isn't as useful a function as it used to be.
I also at last got a notification that a 35 minute update, that I thought I had got done at the service, was available and that wipers and air filter needed changing so maybe the service reset didn't register

 

[tophamn]

Brake blending is perfect once the car has been going for a while. The issue at start up is, you don’t know if your going to get recup (ie blended) braking or just mechanical. Thats where the different/unpredicatable pedal pressure problem arises.

I'm with @WuffvonTrips on this: there shouldn't be any difference in brake pedal feel.

Actually, this whole thread sounds alien to me: I've never felt any of this differing brake feel after parking up overnight. However, I _always_ turn over-run regen on (on, not auto, in normal mode) when I start driving and have never experienced what's being discussed here.

EDIT: I should add I've got PCCB, in case that makes any difference ?.

 

[WuffvonTrips]

I'm with @WuffvonTrips on this: there shouldn't be any difference in brake pedal feel.

Actually, this whole thread sounds alien to me: I've never felt any of this differing brake feel after parking up overnight. However, I _always_ turn over-run regen on (on, not auto, in normal mode) when I start driving and have never experienced what's being discussed here.

EDIT: I should add I've got PCCB, in case that makes any difference ?.

Those are good points of detail. I too always turn normal overrun regen on, and have PSCB.
(My car is MY22 and prior to the brake recall software update felt noticeably different for the first mechanical-braking-only phase of each day and took more conscious effort to engage the "hold" function.)

 

[Graluy]

Le mien est comme ça.
J'avais supposé que la réinitialisation après la nuit ne se produirait pas immédiatement. Il semble que ce soit le cas depuis mon entretien en janvier, où il y a eu des problèmes logiciels.
Mon avertissement d'angle mort ne fonctionne plus depuis lors et ne peut pas non plus être activé car il n'apparaît plus dans la liste des éléments d'assistance que l'on peut activer et désactiver à partir du PCM.
Je peux toujours modifier la luminosité des LED mais elles ne s'allument jamais, sauf lors du réglage de la luminosité.
C'est un peu ennuyeux et je dois en parler au concessionnaire, mais comme j'évite autant que possible les autoroutes de nos jours, ce n'est plus une fonction aussi utile qu'avant.
J'ai enfin reçu une notification indiquant qu'une mise à jour de 35 minutes, que je pensais avoir effectuée au service, était disponible et que les essuie-glaces et le filtre à air devaient être changés, donc peut-être que la réinitialisation du service n'a pas été enregistrée
[/CITATION]
Bonjour,
Si un service disparaît dans le PCM, je vous conseille de déconnecter votre compte MyPorsche dans le PCM, puis de le reconnecter. Cela forcera la synchronisation entre vos services prévus et enregistrés dans les serveurs et votre voiture.
Cette méthode a fonctionné pour moi plusieurs fois (Perte des lieux de relevage automatique suite à une suppression d'un lieu, perte du service d'entretien intelligent, ....)
J'espère que votre navigateur traduira mon français
Bonne journée

Sponsored