The engine P2773 Code is informative. The car engine P2773 code is a DTC reports a sensor fault, spare of the sensor is doubtful to solve the fundamental problem. The fault is the most probable to be instigated by the process that the sensor is monitoring, but might even be instigated by the cabling to the sensor itself. The leak discovery pump is the part of the evaporative releases system. This system tests the fuel structure to make certain it is not dripping fuel vapors into the air. The process pulls a vacuum on the fuel method and holds it for a dated of time.