TSB: Re-Programming 12V Battery Sensor WSS6 - Taycan doesn't start after being parked for long period - Jan. 12, 2026

[linesy]

Hey, Been receiving the circle of death recently. Mainly in underground carparks in high altitude places (could be coincidence). Wondering if anyone has received the 'Electrical Fault' Error since this update ? Had the update done in Feb prior to that never had an issue.

To get the car started had to have the call out to put a booster pack on the 12v for 10mins, lock the car for 10mins and problem temporarily resolved.

Car being taken to Porsche East London tomorrow.

cheers

Sponsored

 

[chun]

Hey, Been receiving the circle of death recently. Mainly in underground carparks in high altitude places (could be coincidence). Wondering if anyone has received the 'Electrical Fault' Error since this update ? Had the update done in Feb prior to that never had an issue.

To get the car started had to have the call out to put a booster pack on the 12v for 10mins, lock the car for 10mins and problem temporarily resolved.

Car being taken to Porsche East London tomorrow.

cheers

Those are signs of a HV module/cell knocking on death's door.

They will probably replace 1 or more module in your HV battery, or maybe, if lucky, give you a whole new battery

 

[linesy]

Interesting outcome if that is the case as I only got the HV battery condition checked 1 month ago and came out at 90%. Certainly be asking for my money back. Though would make sense as I've only been getting around 160 miles in range. OK, I don't drive the car at 60mph!

 

[linesy]

Chun, you were correct. It was high voltage cell failures. Now time to request a refund on the battery conditioning check that was only carried out just before the first 'Electrical Fault' error appeared.

 

[TxnBluDvl]

PCNA is sending out reminder emails re this campaign now. Just got this this am:

Important FREE Battery Sensor Upgrade Now Available at Your Porsche Center – WSS6 Campaign.
Porsche Cars North America, Inc. (PCNA) has new 12V battery software for your vehicle. This new update can be done at your local Porsche Center.

What is the issue?
Due to a software error on your 12V battery sensor, it is possible that the battery data is calculated incorrectly. ‌ This can result in the vehicle not starting after being parked for a longer period.

What will Porsche Do?
Your Porsche Center will update the software. This will be done at NO COST TO YOU.

What should you do?
Please contact your local Porsche Center as soon as possible to schedule an appointment to have the software updated on your vehicle at NO CHARGE TO YOU.

 

[Freeewilly]

Received this from PCNA today.

 

[targa666]

Curious: what us a longer period? A week? Month?

 

[Tblue87]

Curious: what us a longer period? A week? Month?

I know, I have the same question. My guess is they're not sure. I had a 21 Taycan with 12v battery issues, now have a 25 model, got the same WSS6 email this week. Seriously, you would think Porsche would have this issue figured out by now?

Sponsored