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.
Brake Hydraulic System Red Warning Light. An illuminated brake hydraulic system red warning light means that there is a problem with the brake hydraulic system. If the light is intermittent and seems to come on and off depending on whether the vehicle is turning, it may mean that the brake fluid level is getting low.f there is a problem detected, then the red light will stay on. The parking brake light will stay on until the parking brake is completely released. On some vehicles, these lights look very similar, so make sure you know where each light is located in the instrument panel and what its purpose is.