Kia Soul 0553: Too high Fuel Tank Pressure Sensor/Switch

Kia Soul employs an evaporative exhaust control (EVAP) to move fuel vapors from its fuel tank.  The fuel tank's pressure can rise to dangerous levels. P0453The check engine light turns on when a, is thrown.

Your Soul will not be at risk if the sole trouble code you have is P0453.  The EVAP system controls the movement of fuel vapor.  The EVAP system's ability to move fuel vapor has no bearing on your engine's performance.  We don't endorse ignoring this code.

P0453 Kia Soul

 

The EVAP system does not work all the time.  It uses a  valve to open and close the system to release fuel vapor into the engine to be burned off.

It is the fuel tank pressure sensor that detects excessive pressure.  It measures the air pressure inside the tank and not the fuel pressure.  When it happens, P0453 will be thrown.  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:  Kia Soul
  2. The causes
  3. Diagnostics for P0453 on the Kia Soul
    1. How to Make Your Home a Better Place
    2. How a mechanic will do it
  4. Kia Soul: P0453 Conclusion

P0453 Symptoms:  Kia Soul

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.


The causes

Below are some more frequent causes of P0453.

  • Charcoal canister Vent valve, clogged
  • Pressure sensor in fuel tank damaged (sensor or wiring).
  • Fuel tank damaged
  • PCM/ECM (highly unlikely)

Diagnostics for P0453 on the Kia Soul

Diagnosing P0453 in your Soul 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.

 

How to Make Your Home a Better Place

  • If you happen to notice the sound of air escaping when you take your Soul’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.
  • You should check the wiring for the fuel tank pressure sensor to see if there are any frayed wires.  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.  This can be heard depending on which year and model of the vehicle.

 

The fuel pressure sensor wiring will need to be checked if it isn't in spec.  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.


Kia Soul: 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.  You can fix your soul!

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