Okai Error Code 15E

"Lost firmware of the ECU. The ECU failed to update the program."

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

If you clicked the wrong error code, go back to the Error Code Index.

Previous Error Code: Okai Error Code 14E - Next Error Code: Okai Error Code 16E

Cause

Error code 15E indicates that the ECU failed to update its firmware successfully. This could be due to:

• Interrupted update: The update process might have been interrupted before completion, leaving the ECU with corrupted firmware.
• Faulty firmware file: The firmware file used for the update might be corrupted or incompatible with the ECU.
• Hardware failure: The ECU itself might have a hardware problem that prevents it from updating correctly.

Fix

• Re-send the update command.
• Change the ECU.