The ERROR 02 on YL81F display is a Communication failure, you need to check which component is faulty
E02 fault code check
1. Unplug all the cables on the car, only connect the green cable on the instrument, then connect the power and turn on the machine to see if the instrument displays the E02 code.
2. If E02 is displayed, it is a communication failure of the controller, which can be solved by replacing the controller.
3. If all the cables are unplugged and E02 is not displayed, but other fault codes are displayed, you need to check the faults of other accessories.
4. Check other parts: (① Connect the cables of other parts in sequence, observe the instrument display after connection, if E02 is not displayed after connection, connect the cables of the next part, ② observe which cable has E02 after connection, and replace the corresponding spare parts.)
E10, 30H, E02 communication troubleshooting video 1: https://youtu.be/_u-hpdG4vRU
Video 2: https://youtu.be/kS8cbdHgxcg
