Why does my Dongfeng Citroen C4L( 1.6T) always give an alarm when the water temperature is too high?

1. First, judge whether the water temperature is really high or whether the water temperature sensor is faulty, resulting in a virtual high water temperature;

2. There is a lot of coolant;

3. Whether there is air in the cooling system;

4. The cooling fan does not turn, and there is no high-speed rotation;

5. Whether the thermostat does not open the large cycle;

6. Check whether the ignition advance angle lags behind.