Fuel tank pressure (FTP) sensor — replacement Ford F150

Warning: Gasoline is extremely flammable, so take extra precautions when you work on any part of the fuel system. Don’t smoke or allow open flames or bare light bulbs near the work area, and don’t work in a garage where a gas-type appliance (such as a water heater or clothes dryer) is present. Since gasoline is carcinogenic, wear fuel-resistant gloves when there’s a possibility of being exposed to fuel, and, if you spill any fuel on your skin, rinse it off immediately with soap and water. Mop up any spills immediately and do not store fuel-soaked rags where they could ignite. When you perform any kind of work on the fuel system, wear safety glasses and have a Class B type fire extinguisher on hand. The fuel system is under pressure, so if any lines must be disconnected, the pressure in the system must be relieved first (see Fuel and exhaust systems for more information).

1. The fuel tank pressure (FTP) sensor is used to monitor the fuel tank pressure or vacuum during the OBD-II test portion for emissions integrity. This test scans various sensors and output actuators to detect abnormal amounts of fuel vapors that may not be purging into the canister or the intake system for recycling. The FTP sensor helps the PCM monitor this pressure differential (pressure vs. vacuum) inside the fuel tank. A problem in the fuel tank pressure sensor circuit will set a diagnostic trouble code.

Note: The Fuel Tank Pressure (FTP) sensor is part of the vapor tube assembly and serviced as one unit.

2. Remove the fuel tank (see Fuel tank – removal and installation).

Ford F150 Emissions and engine control systems_Fuel tank pressure (FTP) sensor - replacement _ Identifying the fuel pressure sensor and tube on top of the fuel tank

Identifying the fuel pressure sensor and tube on top of the fuel tank

3. Disconnect the vapor tube from the quick-disconnect fittings and remove the vapor tube and FTP sensor

4. Installation is the reverse of removal.

5. Turn the ignition on and check for leaks.

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