Ford Escape P0453 - Fuel Tank Pressure Sensor/Switch To High

Ford Escape employs an evaporative exhaust control (EVAP), which moves fuel vapors between the tank and the filler neck. They then go to the engine where they are burned.  The fuel tank's pressure can rise to dangerous levels. P0453The check engine light turns on when a thrown.

Your Escape will not fail if the sole trouble code you have is P0453.  The EVAP is responsible for transferring fuel vapor.  It doesn't matter if it does that, or not. This has no impact on how your engine works.  We don't endorse ignoring this code.

P0453 Ford Escape

 

The EVAP isn't always functioning.  It uses a  valve to open and close the system to release fuel vapor into the engine to be burned off.

This sensor detects if the fuel tank pressure is too high.  It is not fuel pressure, but air pressure.  If it does so, then P0453 will be thrown.  The fuel tank pressure sensor, also known as the fuel pump pressure sensor, is usually located on the top of your gas tank or fuel pump.

The opposite of this code is P0452, which is thrown whenever the system pressure is too low.


Índice de Contenido
  1. P0453 Symptoms:  Ford Escape
  2. The causes
  3. Diagnostics for P0453 on the Ford Escape
    1. Here are some things you can do at home
    2. How a mechanic will do it
  4. Ford Escape: P0453 Conclusion

P0453 Symptoms:  Ford Escape

P0453 Check Engine

There are usually no symptoms that can be associated with the code.  The check engine light will illuminate (that’s why you’re here).

You may only notice the fuel smell.  The EVAP system will not purge the fuel vapor properly and it will look for other routes to escape.


The causes

These are some of the most common reasons for P0453.

  • Charcoal canister Clogged vent valve
  • Fuel tank pressure sensor damaged (sensor, or wiring)
  • Fuel tank damaged
  • PCM/ECM (highly unlikely)

Diagnostics for P0453 on the Ford Escape

Diagnosing P0453 in your Escape can be challenging if you don’t have a scan tool that is capable of reading the fuel pressure sensor data or capable of commanding the vent valve to open and close.

 

Here are some things you can do at home

  • If you happen to notice the sound of air escaping when you take your Escape’s gas cap off, that is a telltale sign that the vent valve is bad, or the charcoal canister is bad(it’s pressure leaving the gas tank).  You can open the cap by driving for awhile.  It’s hard to notice the sound when you’re at a noisy gas station.
  • Examine the wiring connecting to the fuel pressure sensor. If it is damaged or frayed, you should inspect it.  If it isn’t then the only way to really diagnose it is with a professional mechanic’s scanner.  This is difficult because you may need to remove the tank from your vehicle to be able to examine it.

How a mechanic will do it

  • The data of the fuel pressure sensor will be captured by a mechanic to determine whether it detects any vacuum.
  • You can also tell the vent valves to open or close.  You can also hear the engine running depending on your vehicle's year.

 

A mechanic can inspect the wiring leading to the fuel pressure sensor if the fuel tank pressure is not within the specifications.  The fuel pressure sensor must be replaced if it is not working as expected.

The charcoal canister must be replaced if the vent valve turns on and the pressure sensor works fine.  If the vent valve doesn’t come on, it will need replacement in order to clear P0453.

If all appears to be in order, it could indicate that the PCM may not work properly.


Ford Escape: P0453 Conclusion

That’s pretty much it.  While there are only a couple of common things that’ll cause P0453, there it can be tough to diagnose it without the right equipment.  It’s not going to leave you stranded on the side of the road either.  Good luck fixing your Escape!

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