The vapor pressure of a liquid is the point at which equilibrium pressure is reached, in a closed container, between molecules leaving the liquid and going into the gaseous phase and molecules leaving the gaseous phase and entering the liquid phase.n explanation of vapor pressure. Vapor pressure is constant when there is an equilibrium of water molecules moving between the liquid phase and the gaseous phase, in a closed container.
When a potential problem is detected, a dashboard warning light called a malfunction indicator light (MIL) is illuminated to alert the driver. An OBD system detects a problem well before symptoms such as poor performance, high emissions or poor fuel economy are recognized by the driver.
A warning light is displayed on the dashboard if the coolant temperature is too hot. What the coolant temperature warning light means. On engine startup, the warning light will illuminate for a second or two to check the bulb and should then go out. If the warning light is illuminated even after startup, it indicates that the carâs computer has detected an issue within the system. The most common reasons for the warning light to displayed are the temperature or fluid level of the coolant. If you are driving when this warning light goes on, pull over safely as soon as possible and shut off the engine to let everything cool down.