Okai Error Code 13E

"Cannot communicate with BMS - check BMS connection, replace BMS or battery"

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 12E - Next Error Code: Okai Error Code 14E

Cause

Error code 13E indicates that the ECU cannot communicate with the Battery Management System (BMS). This could be caused by:

Loose connection: The wiring connecting the BMS to the ECU might be loose or disconnected.
Damaged connector: The connector between the BMS and the ECU might be damaged or corroded.
Faulty wiring: The wiring connecting the BMS could be damaged or broken.
Faulty BMS: The BMS itself might be malfunctioning.
Faulty Battery: The battery might have a problem that is preventing the BMS from working correctly.

Check BMS connection: Inspect the wiring connecting the BMS to the ECU. Make sure all connections are secure and there is no damage to the wires.
Clean or replace connectors: If the connectors are corroded or damaged, clean them or replace them.
Replace BMS: If the wiring is in good condition, the BMS itself might be faulty and need replacement.
Replace battery: If replacing the BMS doesn't solve the problem, the battery itself might have a problem. Consider replacing the battery.