V2 Software Windows 10 — Kess

Always connect a battery charger to the vehicle while reading or writing an ECU. A voltage drop can "brick" the unit. Backup First:

Most KESS connection issues come from FTDI/CDM drivers: kess v2 software windows 10

Troubleshoot > Advanced Options > Startup Settings > Restart to "Disable driver signature enforcement." Connect the Hardware: Always connect a battery charger to the vehicle