It's cold now, and I stopped outside for a few days. Why is the fetal pressure low?

Yes, the tire pressure will change with the temperature. Generally, the tire pressure is normal between 2.2 and 2.5. It is recommended that the tire pressure of 2.5 is the best, so the fuel consumption is low. When driving at high speed, the tire pressure can be guaranteed within the safe tire pressure range of 3.0.