Share the Error code here please, other may benefit in future for referrance.
Thank you.

 

The codes were for incorrect PDK version coding, and there were PSM and ABS faults for incorrect version coding as well. Its all working now.

 

I also have successfully bricked the TCU on my 991.1 C2S during TCU software update that ended with an error.
I tried reprogramming option several times but it didnt work as if the module was corrupted. Had it towed to the dealer and they recommended TCU replacement which was a 3 month wait.

Car back in my shop with PIWIS 3 connected I selected new component replacement option and it formatted the TCU completely and reprogrammed the module successfully.

 

So you did select Transmission Module then--Maintenece/Repair---Replace Control unit?
Or Staight to Coding/Programming?

Are you using OEM PT3G?

 

I selected Transmission Control - Maintenance/repair - Control Unit Replacement, in Engineering Mode if that matters.

I used a Chinese knock off PIWIS 3. No internet connection.

 

@Jae S. Park Was this after you installed a different/new TCU? We are trying to chase down a similar issue after some changes to the the clutch and engine.

 

no it was the original TCU.