What is the cause of the failure of Buick Excelle p0 128?

The fault of Buick Excelle p0 128 is that the cooling system is not circulating smoothly and the medium is insufficient, that is, the cooling water of the vehicle engine cooling system is insufficient, which leads to poor circulation. Adding coolant can solve the problem. The specific operation steps are as follows:

1. Open the driving door of Buick Excelle. ?

2. Pull the hood switch of Buick Excelle. ?

3. Open the hood of Buick Excelle. ?

4. Slowly unscrew the small kettle cover of Buick Excelle water tank, and release the internal high-pressure gas. ?

5. Add cooling water to the small kettle of Buick Excelle to the maximum position. ?