Plug the OTKEFDI USB cable into your laptop.
If your device didn't come with an installation CD (or if your laptop lacks a disc drive), you will need to download the drivers directly from the chip manufacturer. Method 1: Installing the CH340 Driver otkefdi obd2 driver
Most high-quality OTKEFDI devices use the , which is preferred for its stability, speed, and compatibility with popular diagnostic software like ForScan , ELMConfig , and INPA . Step-by-Step Installation Guide (Windows) Plug the OTKEFDI USB cable into your laptop
Look for an entry named or CH340 USB Serial Port . Note the number in parentheses next to it (e.g., COM3 ). Step-by-Step Installation Guide (Windows) Look for an entry
For Fiat Chrysler Automobiles (FCA) built after 2018, you may need an SGW bypass module to fully access the OBD2 port with aftermarket tools, including many OTKEFDI scanners.
What (year, make, model) is being diagnosed? What diagnostic software is being used with the adapter? Share public link
: Roll back the driver in Device Manager, or completely uninstall the device, restart the PC, and reinstall the official driver. Issue 3: Timeouts and Lost Connections