Here is the operation instruction on how to read and write a Porsche remote key with vvdi2 key programmer and vvdi prog.
Step 1. Read Porsche BCM data with vvdi prog.
Disassemble the CM from Porsche.
Connect vvdi pro with the laptop.
Open the vvdi pro software.
Porsche type: DCM-2M25J. Go to the wiring diagram.
Connect to the BCM according to the wiring diagram.
Close the wiring diagram.
Detecting the device…(the yellow light on vvdi prog flashes.)
System prompts that the chip need to decrypt.
Click to remove encryption bit.
Save the data.
Step 2. Write Porsche key with vvdi 2.
Open vvdi2 Quick Start.
Go to Transponder Programmer.
Go to Security Data Tool.
Select European, Porsche, 2M25J. Then to load the BCM data saved just now.
Select Yes to erase the key.
Delete key 2 to go on.
Click Yes to establish a new file. Name the file and save it.
Load the new file saved just now.
Only one key ID left.
Write a new key:
Select key2 and click “Generate Dealer Key”.
Generating dealer key…
Successfully generate dealer key. Click OK to save the new data and write back to BCM.
VVDI2 and VVDI PRO finish programming Porsche key.