Connect the tool to the OBDII port, launch the software, and select the specific vehicle make, model, and engine type. Perform an ID Check first to verify communication.

Attempted firmware update from 4.036 to 4.037 or higher. Solution: This is a partial brick. You need to reflash the bootloader using a ST-Link programmer directly to the Kess unit's motherboard. Prevent this by disabling internet while Kess 5.030 is open.

To see the step-by-step process of connecting the hardware and performing a successful ECU read: How to read an ECU using a Kess v2 YouTube• Sep 4, 2025