Which are you currently running?
You need an ELM327 interface. While cheap ELM327s ordered online often work, many require you to open the casing and remove a specific resistor (usually marked as R04) to allow full access to all vehicle modules. For a hassle-free experience, it is highly recommended to purchase a modified ELM327 specifically engineered for Italian vehicles.
Go back to Device Manager > Ports > Properties > Port Settings > Advanced . Locate the Latency Timer (ms) setting and change it from 16 to 1 . This significantly speeds up communication between the computer and the car. multiecuscan elm327 port settings 2021
Ensure "Serial Enumerator" is checked and "Receive/Transmit Buffer" sizes are at their defaults or maximum. Multiecuscan Software Setup
: Open MultiECUScan and press F9 to enter the Settings menu. Which are you currently running
Optimizing Multiecuscan ELM327 Port Settings: A Complete Guide
This is where 90% of users fail. Click the tab and configure exactly as follows: For a hassle-free experience, it is highly recommended
Note: If you have a high-quality modified interface using an FTDI chip, you can experiment with 115200, but 38400 offers the highest success rate across budget modules. Validation Test
For further details, you can consult the MultiECUScan User Guide or official support from iDiagnostics . Windows 10 configure USB ports for Multi ECU Scan
The "2021" in your request is critical. Cars produced in late 2020 through 2021 began transitioning to the Gateway (SGW) security system.