Red Electrical System Error 😥

[Watchesandburgers]

Had my car in for the passenger seat sensor recall. Got it back yesterday. Today, went to drive to the grocery store and *bam*! Electrical system error. I’ll let you know what happens….

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[DerekS]

What model year is your GTS, watchaburger?

I am quite interested to know if this one lands with an e-box replacement as mine did.

 

[Watchesandburgers]

What model year is your GTS, watchaburger?

2022

 

[DerekS]

2022

Mine was 2023. Mileage? Mine was 26.5k.

 

[Watchesandburgers]

Mine was 2023. Mileage? Mine was 26.5k.

Around 11k.

 

[Briguy]

The Red Circle of Death. Been there with my 2020 Taycan about one year ago. Entirely new battery replacement for us. but that was because my '20 was a gen 1 and they could not do the individual cells on it. 3 months at the dealership before our car was returned.

 

[Watchesandburgers]

Update 1: The dealership's main battery technician is out through New Years, so I have to wait until next week to get more details. That said, my service rep told me that's it almost certainly a battery module failure, and likely a 1-3 month thing. Hoping for more details, but looks like I'm driving a Macan for a while....

 

[DerekS]

Update 1: The dealership's main battery technician is out through New Years, so I have to wait until next week to get more details. That said, my service rep told me that's it almost certainly a battery module failure, and likely a 1-3 month thing. Hoping for more details, but looks like I'm driving a Macan for a while....

The one thing I discovered during my misadventures with this error - the car does not seem to hold logs like I'd expect. I'm not ruling out incompetence on the part of my shop though, as they've certainly shown plenty of that.

To me, if I see a yellow or red Electrical System Error, that fault ought to be stored in such a way that the service center can definitively identify it and the correct fix.

 

[Sace]

The one thing I discovered during my misadventures with this error - the car does not seem to hold logs like I'd expect. I'm not ruling out incompetence on the part of my shop though, as they've certainly shown plenty of that.

To me, if I see a yellow or red Electrical System Error, that fault ought to be stored in such a way that the service center can definitively identify it and the correct fix.

Fully agree that these cars are not logging errors in a meaningful way. I had a suspension fault that cleared never to be seen again - And they could not see anything. Seems like the error log concept of "legacy" cars are just build that way (saw the same on my Audi's).

Must be hard to diagnose the cars as well when they don't keep a decent log.

 

[Watchesandburgers]

Update 2: Six modules being repaired/replaced. Estimate now 2-4 months.

 

[Tooney]

Update 2: Six modules being repaired/replaced. Estimate now 2-4 months.

Will they replace the modules locally, or ship the battery to a contractor for repair?

 

[Watchesandburgers]

Will they replace the modules locally, or ship the battery to a contractor for repair?

My service guy wasn't 100% sure, but said he believed "replace locally" was the answer.

 

[prj]

The one thing I discovered during my misadventures with this error - the car does not seem to hold logs like I'd expect.

It does. The problem is that with the red error of death it stops charging the 12V battery.
Then it runs out and the car cuts power to all the modules. At that moment all the faults get erased in all the modules, as the RAM where they store these gets powered off.

If the 12V does not go flat then everything can be retrieved.

 

[DerekS]

It does. The problem is that with the red error of death it stops charging the 12V battery.
Then it runs out and the car cuts power to all the modules. At that moment all the faults get erased in all the modules, as the RAM where they store these gets powered off.

If the 12V does not go flat then everything can be retrieved.

I believe you.

The (completely incompetent) shop I kept using assured me otherwise.

It would be straight stupid for a car to throw a "holy shit service needed" error without leaving a note for the techs as to what the problem is.

 

[prj]

I believe you.

The (completely incompetent) shop I kept using assured me otherwise.

It would be straight stupid for a car to throw a "holy shit service needed" error without leaving a note for the techs as to what the problem is.

I am not quite sure why, but all the cars I've ever worked on clear the fault memory in all the controllers when you remove the 12V.
It might be because the car should start from a "clean slate" when the power is taken off and back on.

But yeah, with the Taycan when you have a HVB error then it can't charge the 12V. The 12V is very low capacity (the starter batteries used in ICE cars are like 2-3x as big), and the car is full of high current consumers, so it goes flat in a few minutes...
They could have thought about it and store the BMS errors in non-volatile memory... but I guess they didn't.

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