Yet another electrical system error - ARB6 software in action?

[Hirschaj]

The yellow circle "Electrical System Error" showed up for me last week. Along with that error, I started to get charging errors at exactly 80% charge. To me, that 80% charge limit indicates that the ARB6 software update has identified an issue with my battery. I have an appointment scheduled with the dealership this Friday morning to see what they say.

Using the MapEV software (thanks @prj ) I see an error indicating a problem with module 7 "self discharge detected". tCAN-pro software (thanks @ct14garage ) thinks everything is fine. Screenshots are attached.

I'll update this thread as I learn more from the dealership. For now I'm severely limiting my driving because I don't want a complete failure before I get it to the dealership.

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[Tooney]

Your warning message is different than the one on this recent TSB: https://www.taycanforum.com/forum/t...geing-detected-sep-12-2025.30699/#post-465609

 

[D00notD00d]

Odd error handling/different versions?
Above

TSB

Odd error handling/different versions?
It would be interesting to know why they’re differen.

 

[Dee]

You can clear that DTC if you want to know if it's permanent or just a hick-up.
Your dealer is going to do that anyway.
It's more of a problem if it's stored.
Nice to see the BMS detects at least something.
Good luck.
Keep us informed.

 

[Hirschaj]

You can clear that DTC if you want to know if it's permanent or just a hick-up.
Your dealer is going to do that anyway.
It's more of a problem if it's stored.
Nice to see the BMS detects at least something.
Good luck.
Keep us informed.

I cleared it the first time it happened (last week). It came back after a couple of days.

 

[D00notD00d]

The TSB ‘fault inspection necessary’ one advises against clearing the code

 

[Noan]

Twice the red warning sign in 2 weeks. First week they changed both fans in the coolingsystem. And yesterday they changed the HV battery cable. Fingers crossed.

 

[chun]

Probably a charger failure and not necessarily a battery failure

 

[Hirschaj]

Right behind you at Porsche Austin tomorrow.

 

[Hirschaj]

Did they at least give you an electric Macan and not the garbage base ICE Macan?

 

[Hirschaj]

Ugh. I really hate those base Macans. I will be pushing for something better if I have a long wait.

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