P0496 – How to Fix the EVAP Flow During a Non-Purge Condition

P0496: How to Fix the EVAP Flow During a Non-Purge Condition

I recently encountered the P0496 error code in my car, which is not that alarming but it must be fixed. Are you facing the same issue of P0496 in your vehicle? What exactly is this error?

To put it simply, it basically means there is some issue in the Evaporative Emission Control (EVAP) of your vehicle with the purge flow. To be more specific, the EVAP is purging vapors of the fuel when it is not supposed to be doing this.

What Does P0496 Mean?

Before understanding what exactly the error P0496 means, let me first explain to you the importance of EVAP in your vehicle.

Fuel vapors in your vehicle contain many different hydrocarbons, which are harmful to the environment and create a lot of pollution.

These fuel vapors, containing hydrocarbons, react with the air and form smog. Evaporative Emission Control (EVAP) is a system that seals the fuel vapors from escaping into the atmosphere from the fuel tank and fuel system of your vehicle.

If your vehicle is showing P0496, it means there is an issue in the EVAP with the purge flow, and to be specific, the Evaporative system is purging vapors of the fuel when it is not supposed to be doing this.

You won’t face any driving issues if your vehicle shows the error code P0496.

P0496 - How to Fix the EVAP Flow During a Non-Purge Condition

Causes of P0496 Error Code

There can be several reasons for the error P0496 in your vehicle and you must know them all to fix it in case you encounter this code in your vehicle.

Faulty EVAP Purge Volume Control

  • The most common cause of error P0496 is the faulty EVAP Purge Volume Control.
  • This valve controls how much fuel vapor is purged from the charcoal canister back into the engine of your vehicle to be burned.
  • If it’s not working right, the possibility is that it may not be able to control the flow properly, which leads to too much vapor moving at the same time.

Faulty EVAP Pressure Sensor

  • The pressure sensor present in the EVAP helps in monitoring the pressure in the EVAP system.
  • If there is any issue in the sensor, it will provide incorrect information, which P0496 will show.

Leaking EVAP Pressure Hose

  • A pressure Hose in your vehicle is used to carry the fuel vapor from the fuel tank to the charcoal canister and eventually to the engine.
  • If there is any leak in the hose, it will hamper the functionality of the EVAP system of your vehicle, which will cause the error P0496 to show.

Poor Electric Connections

  • If the wires or connections are loose or damaged, it will show the error code P0496, as EVAP won’t function properly.

Leaking Charcoal Canister

  • If the charcoal canister that stores the fuel vapors is leaking, the vapor will escape, which will cause the error P0496 to show.

How to Fix P0496 Error Code

As you know now, there can be many reasons why the code P0496 is showing in your vehicle, and it can be fixed as well.

Fix P0496 Error Code from a Mechanic

There are basically two ways to fix this error in your vehicle.

The first and simple way to fix this error is to take your vehicle to the nearest auto repair shop and get it done by a professional mechanic, as it requires a bit of knowledge and is a time-consuming process.

I would advise you to get it done with a mechanic, as the EVAP system is one of the most complex systems in your vehicle.

Also, every model may have a different system, which may cause more harm than good if you don’t do it properly.

How Much will it cost to Fix Error P0496?

If you have made your mind and want to get it fixed by a mechanic, here is an estimated price that may cost you depending on the labor cost of your area:

  • EVAP Purge Volume Control Valve (Purge Valve): $150–$200
  • EVAP Pressure Sensor (Fuel Pressure Sensor): $280-$330
  • EVAP Line (Vacuum Line): $20-$100
  • Canister Purge Solenoid: $150-$300

P0496 - How to Fix the EVAP Flow During a Non-Purge Condition

Fix P0496 Error Code by Yourself

If you want to save a few bucks and want to repair it yourself at home, you can do that as well. But as I said, it will require a bit of time if you are a complete beginner.

Now let me explain a simple way to diagnose it in your vehicle if this error is showing. If you are still unable to find the cause, then it’s better to reach out to a mechanic.

  • See, if you have advanced tools that help in diagnosing this code, then its good; if not, then just follow the basic diagnosing steps.
  • Firstly, you need to disconnect the vacuum line at the purge valve, which is going to the charcoal canister.
  • Now, disconnect the connector on the valve.
  • Start the engine.
  • As you start the engine of your vehicle, put a finger on the valve where you disconnected the vacuum line.
  • If you are able to feel the vacuum, then there is an issue with the purge solenoid. You can replace the solenoid.

If there is no issue with the purge solenoid, then there is a high possibility that the problem either lies in the valve or the fuel tank pressure sensor.

Now its time to check the fuel tank sensor. To check this, you will need an advanced scanning tool; otherwise, it won’t be possible.

If you have a scanning tool, then check the gas pipe and check the fuel tank pressure. If it shows vacuum when the gas pipe is removed, then the problem is with the tank pressure sensor.


What else can you do??

  • You can check if there is any fuel vapor leakage from any hoses or seals, and if there is, you can repair it yourself.
  • Check if there is any wire that is damaged or loose that is causing the error P0496. 


Will a P0496 code clear itself?

No, it won’t clear itself; you need to get it fixed as it was an error caused by a fault in our vehicle.

Can bad gas cause P0496?

No, bad gas is not responsible for the P0496 error in your vehicle.It is related to a fault in the EVAP system.

Can a dirty air filter cause P0496?

No, a dirty air filter cannot cause an error P0496, as the error is related to an issue in the EVAP system of your vehicle, like an issue in the purge valve or vent valve.

Can a loose gas cap cause P0496?

No, a loose gas cap cannot cause a P0496. A loose gas cap is related to the P0455 error code.

Can Maf Sensor Cause P0496?

No, an issue with the Maf sensor cannot cause a P0496 error in your vehicle.

Is It Safe to Drive with the Code P0496?

Yes, it is safe to drive if your vehicle is showing a P0496 error, but its better to get it fixed soon to avoid any bigger problems.

How to Fix Error P0496 in Chevy?

You must get it fixed by a professional mechanic to avoid any damage or issues while fixing it yourself.

To Wrap Up

I hope all your doubts regarding error P0496 are clear. If your vehicle is showing such an error, its not an alarming sign, but you must get it fixed.

Apart from this, if you have any other problems, you can ask in the comments below.

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