Replacing a fuel tank pressure sensor. Is this different than the fuel regulator on the fuel pump?

The fuel tank pressure sensor in a 2010 Ford Escape is part of the vehicle's fuel pump assembly. You will find it either inside the tank or mounted to the top of the tank. The P0451 code indicates that the EVAP system pressure sensor is malfunctioning in some way. This code is usually caused by either a bad EVAP pressure sensor, a clogged fuel tank relief valve, EVAP lines, EVAP wiring, or a bad fuel cap. If you have other EVAP related trouble codes, it is recommended to focus on them first and see if it helps remedy this one.

One word 'dealership'.

They can hook it up to a pressurized smoke machine and find where the leak is if there is one. There factory scan tool computer diagnostics is also far more informative.

You cancelled the code and it came back?

https://www.autocodes.com/p0451_lexus.html

The fuel tank pressure sensor is mentioned in this short video.
https://www.youtube.com/watch?v=Kj7MQbCh4UA

and the second code P0453
https://www.engine-codes.com/p0453_lexus.html

and videos on that one including the WD40 trick.
https://www.google.com/search?q=Lexus+GX470+P0453

Faults like this are very frustrating.
..

by the way their are a few feul tank sensiors and this code can be part of them so this is your code with problem and solutions https://www.obd-codes.com/p0451 https://repairpal.com/obd-ii-code-p0451 https://www.engine-codes.com/p0451.html

I have never heard of a Fuel tank pressure sensor.. The fuel pressure comes from the Fuel pump which is in the fuel tank.. The pressure is regulated (Fuel Pressure Regulator) on the fuel rail on the engine near the fuel injector/s. The code PO254 is a generic code.. could mean different things.. Does it seem to be impacting how the car is running?

the fuel tank pressure sensor may be the problem. but first check that gas cap is tight and the seal is good on cap. auto parts store will tell you the location of the sensor,or call dealer to find out.

fuel cap, evap canister and its related sensors, vacuum leaks

P0451 Fuel Tank Pressure Sensor Range/Performance. You can try a gas treatment and the code may clear in a day or two. Hope this helps Tim

A defective fuel pressure regulator (located on the fuel rail) may have blown the gasket on the
fuel pump (located in the gas tank).
Another thing to check - the car's computer may have posted
an error code from the fuel tank pressure sensor.. I'm not sure, but if this sensor shows pressure
building in the fuel tank, rather than let it explode its seals, the sensor may intentionally leak fuel
in order to relieve the internal fuel pressure build-up inside the fuel tank.

On the fuel rail (supplies fuel to the fuel injectors on top of the engine), there will be a Schrader valve,
which is your connection to connect your Fuel Pressure Gauge to your car's fuel rail.
Give it a check, but put a shop rag around the connector as your screw it in - fuel (and fuel
pressure) will leak as you install the fuel gauge.

You may get computer diagnostic codes P0158 or P0159 - see below for interpretation.
Note that the PCM is the Powertrain Control Module, which is the car's computer.
Also "TP sensor" is the throttle position sensor.
---------------------------------------------------------------------------------------------------------------------------------------
Trouble Code: P0158

Meaning: HO2S-22 (Bank 2 Sensor 2) Circuit High Input

Possible Causes:

Fuel system is too rich (fuel pressure too high, fuel pressure regulator leaking, or one or more fuel injectors sticking/leaking)

HO2S element is silicon, water or fuel contaminated

HO2S signal circuit is shorted to system power (B+)

HO2S signal tracking (water intrusion) in the connector causing a short between the HO2S signal and heater power circuits

PCM has failed

----------------------------------------------------------------------------------------------------------------------------------------
Trouble Code: P0159


Meaning: HO2S-22 (Bank 2 Sensor 2) Slow Response

Possible Causes:

Exhaust leak present in the exhaust manifold or exhaust pipes

Fuel system is too rich (fuel pressure too high, fuel pressure regulator leaking, or one or more fuel injectors sticking/leaking)

HO2S element is silicon, water or fuel contaminated

TP sensor element broken (can cause false acceleration event)

I don't know how the above could have any effect on temperature. Is the vehicle full of coolant? In my opinion you have two different issues

Hi. the fuel pressure sensor is part of the fuel pump assembly. You will have to remove the fuel pump to replace this. I would go ahead and replace the fuel pump while you are there.You will have to Pull the strainer off the fuel pump and discard it. remove the retaining clip for the fuel pressure regulator so that you can remove the fuel pressure regulator. Disconnect the electrical connections for the fuel pumps and the fuel level sensor. Remove the retaining clip for the fuel level sensor and remove the fuel level sensor by squeezing the locking tangs. the sensor is incorporated in this area.

Please rate and god bless.