The yellow light of the differential lock in front of 300 boxes is on.

1, the throttle position sensor is faulty, and the yellow light of the central differential flashes due to poor air intake, so it is necessary to go to the repair shop to replace the throttle position sensor.

2. If the vehicle solenoid valve fails, the solenoid valve is damaged, or the vehicle vacuum tube is damaged, blocked or not inserted in the corresponding position, so that the solenoid valve is not connected and flashes, you need to go to the repair shop to replace the solenoid valve to ensure that the vacuum tube is accurately connected to the solenoid valve.

3. The vehicle front drive controller is faulty. The front drive relies on the vacuum generated after the engine is started to drive the front drive controller to disconnect the front drive through the vacuum tube. If the front drive controller fails or is damaged, the front drive cannot be disconnected, causing the yellow light indicator to flash. Need to go to the repair shop to repair or replace the vehicle front drive controller.

4. Manual failure. When changing oil, the vacuum tube is not connected well, which leads to the failure of solenoid valve connection. When the oil needs to be changed, the vacuum tube must be connected to the solenoid valve.

5. The differential lock sensor plug switch is damaged. If the induction switch doesn't work normally, the yellow light of the central differential will flash, so you need to go to the repair shop to repair or replace the induction plug switch of the differential lock.