Toyota Corolla: Too high Fuel Tank Pressure Sensor/Switch

Toyota Corolla uses an electronic vaporative emission control (EVAP), system that moves fuel vapors between the fuel tank and filler neck. They then send them to the engine for burning.  The fuel tank's pressure can rise to dangerous levels. P0453The engine light will turn on after the key is thrown.

Your Corolla will not fail if the trouble code is P0453.  The EVAP system moves 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 Toyota Corolla

 

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.  This sensor measures air pressure within the tank. It does not measure fuel pressure.  When it does, the P0453 signal is sent.  The fuel tank pressure sensor can be found on top of the fuel tank, fuel pump or fuel level sending device.

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


Índice de Contenido
  1. P0453 Symptoms:  Toyota Corolla
  2. There are many causes
  3. Diagnose P0453 on the Toyota Corolla
    1. Here are some things you can do at home
    2. How a mechanic will do it
  4. Toyota Corolla: P0453 Conclusion

P0453 Symptoms:  Toyota Corolla

P0453 Check Engine

This code is usually not associated with any symptoms.  The check engine light will illuminate (that’s why you’re here).

You may only notice the fuel smell.  If your EVAP system doesn't properly remove fuel vapor it will seek other escape routes.


There are many causes

Below are the top causes of P0453.

  • Charcoal canister Vent valve, clogged
  • Fuel tank pressure sensor damaged (sensor, or the wiring)
  • Frayed Fuel Tank
  • PCM/ECM (highly unlikely)

Diagnose P0453 on the Toyota Corolla

Diagnosing P0453 in your Corolla 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 Corolla’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).  Once you have driven for some time, turn off the gas cap and go somewhere else.  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

  • To determine if the sensor detects vacuum, a mechanic will take data from the fuel pressure sensor.
  • The vent valve will be opened and closed by them.  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.  A mechanic will inspect the wiring leading to the fuel pressure sensor and replace it if that is found.

If the vent valve is on and the pressure sensors are fine, the charcoal canister needs to be replaced.  If the vent valve doesn’t come on, it will need replacement in order to clear P0453.

If it looks good, the PCM could have a problem.


Toyota Corolla: 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 Corolla!

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