If the cable still shows "Interface Not Found Full," the FTDI chip's EEPROM has been scrambled. You must reprogram it using FTDI's official utility, MProg.
What you need:
The Process:
A hidden cause of the "Full" error is brown-out. The VAG Tacho needs a stable 5V supply from the OBD2 port, but many older VAG cars (pre-2005) have rusted ground pins on the diagnostic port. vag tacho interface not found full
The Fix:
The "Interface not found" error in VAG Tacho (used for reading PIN codes, odometer programming, or key matching on older VAG vehicles) typically appears when the software cannot communicate with the hardware interface (cable/device). Below is a complete breakdown of causes and solutions. If the cable still shows "Interface Not Found