Fuel sensor not working, how do I remove/repair

Fuel tank pressure sensor is a sensor that is on my vehicle and I would assume on all vehicles on the fuel tank itself. Fuel tanks build up pressure (lots of pressure sometimes) They must have a way to vent this pressure so manufactures install fuel tank pressure valves and wire a sensor to it and hook it up to the on board computer. On my Mercury marquis it is impossible to replace my sensor without first removing the fuel tank. So to answer your ? yes the fuel pump regulator is different than the fuel tank pressure sensor. If you need help positively locating where it is go to Autozone.com and create an account (free) and enter your yr/mk/model and there you can go to repair help and view online Chiltons repair manuals. Good Luck!

REMOVAL PROCEDURE
TOOLS REQUIRED
A J 34730-1A Fuel Pressure Gauge
A J 39765 Fuel Sender Lock Nut Wrench
CAUTION: Refer to Batterry- Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
2. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief Procedure. See:
Fuel Delivery and Air Induction/Fuel Filter/Fuel Pressure Release/Service and
Repair
3. Drain the fuel tank. Refer to Fuel Tank Draining Procedure. See: Fuel Delivery and
Air Induction/Fuel Tank/Service and Repair/Procedures
4. Remove the fuel tank.
5. Remove the fuel sender assembly.
6. Disconnect the fuel pump electrical connector (5).
7. Remove the fuel level sensor electrical connector retaining clip (6).
8. Disconnect the fuel level sensor electrical connector (7) from under the fuel sender
cover.
9. Remove the fuel level sensor retaining clip (4).
10. Squeeze the locking fangs and remove the fuel level sensor (3).
INSTALLATION PROCEDURE
1. Install the fuel level sensor (3).
2. Install the fuel level sensor retaining clip (4).
3. Connect the fuel level s ens oi electrical connector (7).
4. Connect the fuel level sensor electrical connector retaining clip (6).
5. Connect the fuel pump electrical connector (5).
6. Install the fuel sender assembly.
7. Install the fuel tank.
8. Refill the fuel tank.
9. Install the fuel filler cap.
10. Connect the negative battery cable.
11. Inspect for leaks.
11.1. Turn ON the ignition for 2 seconds.
11.2. Turn OFF the ignition for 10 seconds.
11.3. Turn ON the ignition.
11.4. Inspect for fuel leaks.

On your dash the letters CO or CS show in the Distance to Empty (DTE) information center. there is a problem with the fuel level indicating system. Most likely the Fuel level sensor has failed, or is not completely as accurate as it needs to be for the DTE function to work. The fuel level sensor would most likely need replacing. Replacing the sending unit requires removing the fuel tank. If you choose to repair this issue i recommend replacing the fuel pump and strainer while you are there.

The tank will need to be removed and the float or sensor repaired.

This is caused by a defective fuel level sending unit inside the fuel tank. To repair the problem you must remove the fuel tank from the car and replace the fuel pump module which is part of the fuel level sensor.

this is a very common problem with this vehicle, they have redesigned the fuel level sensor for it. Unfortunately the sensor is located inside of the fuel tank attached to the fuel pump, you will have to remove the fuel pump from inside of the tank and replace the sensor which will require you to drain and remove the fuel tank first, or take it to a repair facility

Well if the fuel system is dirty remove fuel filter drain tank and remove fuel level sensor, remove tank and use a fuel tank repair kit cleaner then reinstall with new filter and you should be set.

1. This is if it is an internal filter, if it is not you still have to pull the whole bottom of the back seat out and look for the inspection plate.
   
2. Relieve the fuel system pressure by first removing the fuel pump fuse. Then, start the engine and allow it to run until it stalls. Crank the engine for 2 to 3 seconds to release the pressure Turn the ignition off.
   
3. Step 2 Disconnect the negative battery cable. Remove the rear seat bottom and the inspection hole cover. Disconnect the electrical and quick connectors and remove the six screws. Remove the fuel level sensor unit and the fuel pump assembly. Then, take out the flange and snap fit portion of the fuel pump.
   
4. Step 3 Remove the fuel tank temperature sensor harness, the fuel level sensor flange, and the fuel pump connector. Disconnect the quick connectors from the fuel level sensor, and remove the fuel level sensor from the chamber. Take out the fuel filter.
   
5. Step 4 Put the new fuel filter in the chamber, followed by the fuel level sensor. Attach the quick connectors to the fuel sensor. Connect the fuel pump connector and put the fuel level sensor flange and fuel tank temperature sensor harness back.
   
6. Step 5 Place the fuel pump assembly inside the tank. Replace the screws and electrical connectors. Reattach the quick connectors. Reconnect the negative battery cable.
   
7. Step 6 Start your car and check for leaks, and make repairs if necessary. When repairs are complete, replace the inspection hole cover and the rear seat bottom.
   

your probably talking about the fuel rail pressure sensor for a p0193. yes i have done a couple of them. No part of the job is very difficult, just unplug the electrical connections and vac lines on the upper intake. remove the egr pipe and the 8? bolts and remove the upper intake. one the intake is off then you will see the fuel rail pressure sensor ( FRP ) mounted to the fuel rail by 2-bolts. keep in mind when you remove it some fuel might spray out. also i would recommend replacing the 6-upper intake gasket/o-rings. Go to any Advance or Autozone Store and buy the Chiltons Manual for your vehicle. They are around 19.99 and this will have every repair that you will ever need to repair anything on your car. I love theses books. They have pictures and step by step instructions. Hope this helps.

Can't say for sure since you did not include year of your car but more than likely it's the fuel sending unit that requires replacement. Some years you can replace just the level sensor on the fuel sending unit but both repairs involve dropping the gas tank and opening to remove the fuel sending unit.