Fuel Tank Pressure Sensor: Inspection

Prepare a voltmeter and connect it to FTP pins as shown.

Fig 1: Checking Fuel Tank Pressure (FTP) Sensor (1 Of 2)
Courtesy of KIA MOTORS AMERICA, INC.
After 20 min. idling, inspect the voltage.
System voltage: 5V

At acceleration: Max. 4.5, Min. 0.5V

Fig 2: Checking Fuel Tank Pressure (FTP) Sensor (2 Of 2)
Courtesy of KIA MOTORS AMERICA, INC.
At idle, inspect that voltage fluctuates to accelerate RPM up and down.
NOTE: If voltage is not within specification, there is leakage and inspect the fuel tank and hoses toward canister and fuel neck. Then repair or replace relevant parts.