HomeHow ToHow to Clean Purge Solenoid Valve

How to Clean Purge Solenoid Valve

“Take regular maintenance of your dreams and your cars.”

Human beings like to be fully equipped and have all the knowledge of things that can come handy anytime.

Especially for their cars, a person obsessed with his/her car is always going to have extra knowledge about the vehicle so that he/she can repair it whenever it’s required.

And if there’s anything that they haven’t learn about their car maintenance yet, they will grab the first chance to learn new things and use that knowledge practically.

And to support your passion for loving your cars and taking care of it, we are here to help you with its purge solenoid valve cleaning.

So, here is detailed guide on how to clean purge solenoid valve. 

Don’t stop reading if you don’t know how to do it already or have the half knowledge about the topic.

Your Cleaning Guide

“Cleaning is a therapy that I need in my life.”

Cleaning is indeed a therapy and it is scientifically proven so take out all your cleaning gears and equipment because we are about to spill the beans on purge solenoid valve cleaning guide.

But before that, it is our duty to inform our readers who have a little information about this tool located in your car.

So, lets get to some basics to begin with.


Firstly, the purge valve is the part of the vehicle evaporative emission control system that prevents the fuel vapours present in the fuel tank (also called the charcoal canister system), from escaping into the atmosphere while the engine is off.

Secondly, it is basically an atmosphere friendly tool that is used to regulate automotive emissions. In modern cars, the purge valve works with the help of electrically-operated solenoid, that is controlled by the engine computer which is why it is called as purge solenoid valve.

And lastly, the location. In modern cars, the purge solenoid valve is located on or near the throttle body of the engine.

And now it’s time to understand the bad side.

How to Clean Purge Solenoid Valve
How to Clean Purge Solenoid Valve


There are quite a few symptoms that will give you the required hint of a bad or failing canister purge solenoid:

  1. Rough idle is one of the first symptoms that a faulty canister purge valve may give out.
  2. Difficulty in starting the car engine is another symptom commonly associated with a bad canister purge solenoid.
  3. If the engine lights don’t show up, it’s a hint that your canister purge solenoid needs some help because a defective canister purge solenoid may also set off the check engine light.

Now, since the ‘How do I know if my purge solenoid is bad?’ has been answered, let us swiftly move onto the solution section and understand what can be done to repair or clean a bad purge valve.

The Solution Section

“Identify your problems but give your power and energy to solutions.”

We have already identified the problem and we are halfway through the solution. So welcome to the solution section and brace yourself to properly understand how to clean the purge solenoid valve.

These are the steps that you have to follow for Cleaning the solenoid purge valve:

  1. Locate the valve in your car engine and then unplug the vacuum lines and the electrical connector that are also present there.
  2. Remove the valve from the car and if isn’t too dirty then just try cleaning it without opening the valve, it will save time and energy while your work will be perfectly done.
  3. If that doesn’t work, the car’s valve is too dirty and you want to deep clean it, you can do that by opening the purge solenoid valve.
  4. Now, if you have decided to clean the valve by opening it, you should also blow compressed air into the centre opening on the carbon canister so that all the dust/dirt will come out of where the purge valve goes on the canister. It will not only deep clean the valve but it will also stay dust free for a long time, saving you from cleaning it again and again.
  5. Also, coming back to the cleaning, you should also clean the big diameter breather hose that hooks on the inside of the frame of the valve by blowing compressed air into the frame area.
  6. Now, you cleaning is done and you must test the valve and its condition using 2 long wires and a battery.
  7. If you will hear the valve close while testing it, this means the valve is clean and is working now.

We know how to clean the valve, but we don’t know how to test purge valve as of yet, right? 

Let us understand it as well as this testing is crucial and can be done before or after the cleaning, whatever suits you.

We just discussed above ways to clean the valve and how you should test it afterwards.

 Testing should be done to see if the valve is working properly after cleaning or is there any other fault that needs to be find. And therefore, to test the valve, you have to measure its resistance using a multi-meter.

The ideal levels that pop-up on the multi-meter should be between 22.0 ohms and 30.0 ohms. Anything higher or lower than this ratio means that the valve has gone bad and hence it needs to be replaced.

If the ratio is out of or below range then change the valve and if it’s under the required range, then just reconnect the harness cables as they were previously, that you have removed earlier to clean the valve and fit it back in the vehicle’s engine.

Done with how do you test a purge solenoid valve and now its time to understand how to understand that your purge valve has gone bad even without testing it.

  1. The engine controls the purge solenoid, and if anything fails, the engine light will turn on.
  2. The purge valve’s failing to close may also negatively affect the air to fuel ratio. This will happen due to vapor’s leakage into the nearby environment and that will further force the engine to react to this change. The change will include difficulty in powering up the engine or rough idling.
  3. When the EVAP system of the engine doesn’t work effectively, it will decrease the gas mileage of your vehicle and this fault can be detected if you see the fuel vapours seeping out in the environment, causing increased fuel combustion.
  4. The canister EVAP redirects the fuel vapours back into the engine preventing the fumes from escaping into the environment. If the solenoid has gone bad, it wouldn’t be able to control the fumes, and it will fail emission tests giving you a hint of failing valve.
  5. Signs like a blown-out rubber seals and gaskets, oil leakages, pieces of carbon or foreign materials getting stuck in the engine means that the purge valve needs a replacement or cleaning.

And now it’s time to move on and see some other ways of cleaning and protecting purge valve.

Continued Cleaning

How to Clean Purge Solenoid Valve
How to Clean Purge Solenoid Valve

“Cleaning makes you feel happy, motivated and healthy.”

Well cleaning does give you a positive vibe and makes you feel good? How can we say that? Won’t you like to drive your vehicle after doing its thorough cleaning?

And a smooth experience after cleaning it will make you proud of yourself, isn’t it? So, that is why we must continue with our valve cleaning and understand a few more things about it.

Coming back to the topic, do you know reader, many people get confused in between a purge solenoid valve and an EVAP canister?

Are you one of them? Is it really difficult to differentiate in between these two? So, to clear out all your confusions, here is the solution to your query.

What is the difference between purge valve and EVAP canister?

The purge valve is the part of the vehicle Evaporative Emission Control (EVAP) system while the EVAP is a system in itself.

 This system along with purge valve together prevents fuel vapours in the fuel tank from escaping into the atmosphere by trapping the fuel vapours from the fuel tank and temporarily storing them in the charcoal canister.

What are the symptoms of a bad EVAP canister?

The symptoms of a faulty EVAP canister aren’t very different from a faulty purge valve. The common evap purge solenoid symptoms include:

  1. The check engine light coming on.
  2. Raw fuel smell coming from the back of the car.
  3. A collapsed or leaking fuel tank.

And now comes the most important question how to clean evap canister purge valve? Isn’t it important since we are here to solely talk about cleaning and some more cleaning?

So, here the answer to your how to clean evap canister?

If you have checked all the symptoms and they sign towards a faulty EVAP canister that needs cleaning to unclog it, you can use low pressure compressed air to get the job done. 

To clean the canister and remove the clog, just blow low pressure compressed air into the tank pipe while holding the upper canister pipe closed. While doing this job, if you see any of the activated carbon coming out of the canister, replace it because cleaning it won’t help. It has gone bad and now you need a new charcoal canister.

And we are done with the cleaning and repairing information but that’s not all. Some additional and very useful information is waiting for you below.

Don’t miss this out if you want your purge valve knowledge to be fully complete.

How to Clean Purge Solenoid Valve
How to Clean Purge Solenoid Valve

There’s More to It

“Knowledge has a beginning but no end.”

Yes, knowledge surely never ends, especially for those who have an extra urge of gasping all kinds of knowledge on some special topics.

Talking about our topic, yes there’s a little more to it and then we promise this knowledge will end then and there.

This is what you need to know more about purge valves in advance in-case you face a relatable problem in the future.

  • Can you fix a purge valve?

Yes, your purge valve can definitely be fixed easily and the good news is that this repairing won’t break the bank at all. On an average, the cost to repair a broken purge valve varies in between $100 and $200 and majorly this rage struck near to the $100 mark as the repairing takes place in parts and you don’t have to pay the full amount altogether.

If you have done everything that you could to fix the purge valve and it still isn’t working, book a repair with a certified mechanic to diagnose the problem and get it repaired to save your time and energy.

  • What is the difference between a purge valve and purge solenoid?

Another common question and common doubt that people usually face. Difference in between these two components is that the canister purge valve, also commonly referred to as the purge valve is used to trap the fuel vapours created in the fuel tank. 

It prevents them from escaping into the air while the purge solenoid is responsible for “purging in the EVAP system. It also acts as the switch that allows the vapor into the engine.

And it’s all done and dusted. Now go do the cleaning and see how effective it is.


We cannot take our vehicles to a mechanic every now and then for the smallest of reasons. What we can do is grab some information and see if the problem can be fixed at home?

This will not only polish your skills as a self-taught mechanic but will also save your money from spending on pity things that you can fix alone without any professional help.

- Advertisement -spot_img
Shashank Jain, founder of good-name, a young and energetic entrepreneur has always been fond of technology. His liking for technology made him go for engineering in computers. During his studies, he learned & worked on different computer languages & OS including HBCD, Linux, etc. He also has a keen interest in ethical hacking.
Must Read
Related News
- Advertisement -spot_img


Please enter your comment!
Please enter your name here