Sedona V6-3.8L (2009)
Fuel Tank Pressure Sensor: Description and Operation
DESCRIPTION
The evaporative emission control system prevents hydrocarbon vapors from escaping from the fuel tank into the atmosphere where they could form
photochemical smog. Gasoline vapors are collected in the charcoal canister. The Fuel Tank Pressure Sensor (FTPS) is installed on fuel pump assembly
and is an integral part of the evaporative monitoring system. The PCM monitors the FTPS signal to detect vacuum decay and excess vacuum. The FTPS
measures the difference between the air pressure inside the fuel tank and outside air pressure to check the purge control solenoid valve operation and for
leak detection in the evaporative emission control system by monitoring pressure and vacuum levels in the fuel tank during the purge control solenoid
valve operating cycles.
