Fuel Tank Pressure Sensor (FTPS): Description
WARNING: This page is about a different car, the 2011 Hyundai Elantra Touring. However, it is still accessible from the selected car via links, so may be relevant.
Fuel Tank Pressure Sensor (FTPS) is a component of the evaporative emission control system and is installed on the fuel tank, the fuel pump, or the canister. It checks the purge control solenoid valve operation and detects a leakage of the system.