How do i replace the fuel tank pressure sensor on a 96 Bonneville do you have to drop the tank

will need to drop tank down or enough to reach the top of tank and to disconnect connector and pry off the old one and to push install new one this link is for a suburban but its the same concept only larger and can see much clearer how to do replacement

Yes the tank must be dropped, but not entirely removed, the sensor is on the top of the tank.

You have no fuel safety shut off switch
They are only on ford products

Are you referring to the fuel tank level sensor for the
dash fuel gauge?

If you go to Rock Auto.Com-- you will see that the sending
unit is about $50.00

The mechanic is really screwing you over for sure

Drop the fuel tank & replace yourself

your fuel tank pressure sensor is part of your fuel pump assy and is replaceable without changing the fuel pump. sad news is you still have to drop the gas tank to replace it

they are all emission faults

P0453 OBD-II Trouble Code: Evaporative Emission Control Pressure Sensor High Input. P0453 code means that a reading from the engine's evaporative pressure sensor is higher than normal due to fuel tank vapor leaks into the system.

saturated carbon canister
sensor faulty
rubber evap hoses at the tank perished

idea
check the tank fuel cap seal is working
replace the cap is one possible cause

check the fuel pump pressure or for injector rail leak
P0446 Evaporative Emission Control System Vent Control Circuit Malfunction. The code P0446 is set when the engine computer recognizes a fault or restriction at the vent control part of the Evaporative emission control system (EVAP).

The Code P0452 indicates that the Evaporative Pressure Sensor is indicating pressure change values that are below specification, during the EVAP Monitor test and/or the operation of the vehicle.

the line itself unscrews from the lid that sticks into the tank. you should be able to reach it from up under the car in front of the tank. the line runs all the way up to the engine compartment. you would only need to replace it if it was damaged (crushed or leaking), as it is highly unlikely to be blocked or clogged otherwise.

Here's list why your car is coming up with this code. It could be any of these things causing it.
DTC detecting condition:

• EVAP control system has a leak.
• EVAP control system does not operate properly.

Possible cause:

• Incorrect fuel tank vacuum relief valve
• Incorrect fuel filler cap used
• Fuel filler cap remains open or fails to close.
• Foreign matter caught in fuel filler cap.
• Leak is in line between intake manifold and EVAP canister purge volume control solenoid valve.
• Foreign matter caught in EVAP canister vent control valve.
• EVAP canister or fuel tank leaks
• EVAP purge line (pipe and rubber tube) leaks
• EVAP purge line rubber tube bent
• Blocked or bent rubber tube to EVAP control system pressure sensor
• Loose or disconnected rubber tube
• EVAP canister vent control valve and the circuit
• EVAP canister purge volume control solenoid valve
• EVAP canister purge volume control solenoid valve and the circuit
• Absolute pressure sensor
• Fuel tank temperature sensor
• O-ring of EVAP canister vent control valve is missing or damaged
• Water separator
• EVAP canister is saturated with water
• EVAP control system pressure sensor
• Refueling control valve
• ORVR system leaks
• Fuel level sensor and the circuit

Inside the fuel tank. Check fuel pressure, should be around 50psi.

I HAD SAME PROBLEM DROVE ME NUTS FOG LIGHT ALSO CAME ON WHEN I HIT THE POWER SEATS . DEALER TOLD ME 1800$ WOUL FIX IT .FOUND CORRODED WIRE UNDER KICK PLATE . HAD IT FIXED UNDER 100$

A 1996 Bronco fuel pump is in the tank. The tank will have to be dropped. After that, it's quick & easy. The filter is on the rail, not so easy even with the line removal tools. Wear safety glasses in case of any pressure.