System Description

Fuel evaporative system operation is monitored by PCM/VCM. Engine vacuum is applied to system and monitored for leakage. PCM/VCM monitors vacuum in EVAP system with Fuel Tank Pressure sensor. Amount of engine vacuum is controlled by the EVAP Purge and Vent solenoids. If a specific amount of vacuum cannot be acheived or maintained, PCM/VCM will set DTC. Inspect above listed components for damage or poor connection.