Red electrical system fault - J1.1 Taycan Turbo 2024

[dnkoutso]

Hello!

I am on a Taycan Turbo 2024 with 7500km. Leased brand new with no prior owner.

I was entering my parking garage and had to switch off the car quickly to go and manually open the garage door since the remote for it was out of battery.

I go back into the car and I switch it on and see the red "Electrical system error. Park vehicle in safe place". Car would let me maneuver normally while I am parking and was able to put reverse or drive without any issue.

Plugged in OBD-II with car scanner:

```
37234 [0x009172] Archive (inactive)
U041100: Invalid Data Received From Drive Motor Control Module "A"
U059900: Invalid Data Received From DC to DC Converter, Control Module "A"
9172 Invalid Data Received From DC/DC Converter Control Module "A"
Status bits: 1
Priority: 4
Frequency: 1
Unlearning index: 255
Odometer: 7515 km
Date, time: 2026.02.14 18:30:37
Paramteric values: 20 96 28 4E D0 84 00 02 06 1D 00 00 67 05 00 01 02 00 01 00 00 75 34 44
Status: Confirmed, Test failed since last DTC clear
```

Once I parked, I switched on and off 2-3 times but no more error. I plugged car to charge to 75% and went on a drive this morning. No issues and also performed a software update (I forget what the software update version code was).

12V battery looks good on the dash and nothing out of the ordinary. SOC % is 99.48% according to CarScanner.

What should I do next? If this is a sofware issue as Gemini tells me it could be? If so thats a terrible software bug? Sensor? Something bigger as I see online?

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[BjörnfromHamburg]

What you should do next:
Drive the car and build up confidence over time again.

the 12v will likely give you a yellow circle of death, as the on-board charger or the heater would.

Probably a one-time glitch.

a true red circle of death of death won't let you continue driving.

 

[dnkoutso]

Thanks a lot for this! This is how I am treating it now.

Also from ChatGPT:

```
What Actually Happened

When he switched the car off quickly to open the garage:
1. High-voltage system started shutdown
2. DC-DC converter began power-down sequence
3. Drive motor control modules started going to sleep
4. He immediately powered it back up

You basically forced a mid-shutdown wake-up interrupt.

In EV architecture, especially Porsche’s:
• Modules power down in sequence
• The DC-DC converter stabilizes 12V bus during transition
• HV contactors open/close in controlled timing

If you interrupt that timing window, modules can:
• Wake while another module is still resetting
• Receive incomplete CAN frames
• Flag “Invalid Data Received”

That’s exactly what your codes show:
• U059900 → DC-DC sent invalid frame
• U041100 → Drive motor module received corrupted data
```

 

[Bennachie]

When my OBC and heater went, there were no circles of death; of any colour...

 

[BjörnfromHamburg]

When my OBC and heater went, there were no circles of death; of any colour...

Yes, not necessarily a warning.
My second OBC went 3 days ago with a yellow circle. First one said nothing.

 

[snstevens]

Thanks a lot for this! This is how I am treating it now.

Also from ChatGPT:

```
What Actually Happened

When he switched the car off quickly to open the garage:
1. High-voltage system started shutdown
2. DC-DC converter began power-down sequence
3. Drive motor control modules started going to sleep
4. He immediately powered it back up

You basically forced a mid-shutdown wake-up interrupt.

In EV architecture, especially Porsche’s:
• Modules power down in sequence
• The DC-DC converter stabilizes 12V bus during transition
• HV contactors open/close in controlled timing

If you interrupt that timing window, modules can:
• Wake while another module is still resetting
• Receive incomplete CAN frames
• Flag “Invalid Data Received”

That’s exactly what your codes show:
• U059900 → DC-DC sent invalid frame
• U041100 → Drive motor module received corrupted data
```

Very interesting info. Thanks for sharing!

 

[Taycan4S_UK]

Too much speculation on what it could be… What you should next is contact Porsche to book it in so they can check out the car. In the mean time drive the car if it’s drivable.

 

[SergeyIndy]

Please share OBD screens that show SoH, Battery Energy, and Cell Graphs. Looking for unusual readings and cell outliers that would indicate if this is related to the cells going bad - most common root cause for the Red Circle of Death.

 

[dnkoutso]

Been driving car yesterday and today just fine. Not sure if the screenshots I got are what folks need to read but overall it seems all cells report 3.83V or 3.84V and my current state of charge of 68% at the time the data was collected. At least from my own reading I did not see anything out of the ordinary although I am not an expert of course. For example, I did not see any Cell Module being completely out of whack compared to all the rest...

Confidence is grown more and more in the car as it drives great and never had an issue even when the warning showed up, although I was just parking. Power and everything else feels the same.

How can I get "cell graphs" data? Do I need to be driving?

 

[SergeyIndy]

CORRECTION: I did not use the right value for Battery Energy when new. I am deleting my post.
@gtm, thank you for correcting me.

 

[dnkoutso]

I'll double check again as I am away from the car now but yeah those values came in straight from CarScanner. I do not recall choosing a profile but maybe I did, so that might be an issue.

The car is definitely 2024, J1.1. Taycan Turbo Cross Turismo

 

[dnkoutso]

Btw I looked into the app without a connection but here's the profile:

I was not driving the car when I collected data. I was parked but I had driven for ~40 min.

 

[gtm]

Your last screen from the CarScanner looks completely off, so if I would see that, I would consider that there is something wrong with the battery. Let me explain below. Cell Graphs are part of the Dashboard views as you flip through them, they look like line graphs showing Voltage, SoC, and Temperature of each cell module.

I want to make sure your car is a 2024 and a J1.1 which is sully supported by the CarScanner, unless something have changed with a 2024 not allowing CarScanner to get accurate values. My first thing would be to make sure you set CarScanner to ETron/Taycan profile before connecting and getting the readings.

This is why your data makes no sense.

We know that usable Battery Energy for J1.1 PB+ is around 78kWh at 100% SoC when brand new, so if I use your readings to validate that, then I am getting a 85.99kWh that is way off, because you take Battery Energy 58.7kWh / Display SoC of 68.26%. Also, it is not possible to have 99.31% SoH at your mileage because battery degrades chemically beyond that point for your mileage.

@SergeyIndy - PB+ usable capacity is 86.7 kWh when new. Calculations work out as they should with the OP's battery energy, SoC, and SoH.

 

[SergeyIndy]

@SergeyIndy - PB+ usable capacity is 86.7 kWh when new. Calculations work out as they should with the OP's battery energy, SoC, and SoH.

My apologies, you are absolutely correct, I will make the adjustments. Then 99% is still suspect.

 

[SergeyIndy]

@dnkoutso, my apologies, I was incorrect about the Battery Energy value, so the correct information is that the total checks out fine at around 86kWh, thank you to @gtm for correcting me. However, I find it suspect to have 99% SoH reported at your mileage due to normal and expected battery chemical degradation. I would like to see Cell Graphs to see what might be going on if any outliers.

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