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.
Nissan Dashboard Indicator Lights. If an indicator light is on, this doesnât necessarily mean that there is an issue with your car; it is there to let you know if you have a certain feature, such as the fog lights, activated in a given moment.1  Cruise Main and Set Switch: The word âCRUISEâ indicates cruise control is on.issan Dashboard Indicator Lights. If an indicator light is on, this doesnât necessarily mean that there is an issue with your car; it is there to let you know if you have a certain feature, such as the fog lights, activated in a given moment. 1  Cruise Main and Set Switch: The word âCRUISEâ indicates cruise control is on.