Okai Error Code 28E

"Illegal IoT or ECU. Authentication match between the IoT and the ECU failed."

If your Okai-Electisan vehicle is beeping or has a red wrench icon and flashes this code, read below.

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Cause

Error code 28E indicates that the authentication process between the IoT device and the ECU has failed. This could be due to:

Incorrect authentication data: The IoT device or the ECU might have incorrect authentication data (e.g., wrong passwords, security keys).
Communication issue: The communication between the IoT device and the ECU might be interrupted or corrupted, preventing successful authentication.
Faulty IoT device: The IoT device itself might be malfunctioning.
Faulty ECU: The ECU might be malfunctioning, preventing proper authentication.