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.
These are Key Fob Indicator symbols and are meant to resemble the driverâs hand-held remote control, or fob. The one on the left indicates that the fob is not detected or has been removed from the vehicle. If the fob is in the vehicle, it is not detected and its battery is likely dead.ymbols & Tell-tales. Tweet. A number of picture symbols are used to indicate the presence of an electronic key in a push button start, or keyless ignition, vehicle. These systems will allow a vehicle to be started only when an electronic key is present in, and detected by, the vehicle.