What happens if the water temperature sensor fails
If the water temperature sensor fails, it will make it difficult to start the car cold, and the abnormal water temperature sensor will cause abnormal oil supply and weak acceleration.

When the water temperature sensor fails, the temperature signal when the engine is cold is still displayed when the engine is hot. The ECU can only supply the engine with thinner mixture (signal when the engine is hot), so it is difficult to start the engine when the engine is cold.
In this case, check whether the plug contact of the water temperature sensor is normal or replace the water temperature sensor. The fuel consumption increases sharply, and the idle speed is unstable, which is similar to cylinder shortage and fire interruption; It's difficult to accelerate. Step on the accelerator pedal to accelerate. The speed can't go up. The muffler emits black smoke and makes a "sudden" sound.