Canister Purge Valve Replacement 🏎️ Here’s What You Need to Know

Canister Purge Valve Replacement 🏎️ Here’s What You Need to Know

Vapor Canister Purge Valve Function

Unless you’re a mechanic or an engineer, you’ve pr

Unless you’re a mechanic or an engineer, you’ve probably never heard of a canister purge valve before. To begin with, it’s an emissions component that redirects excess fuel vapors back into the engine.

The entire system that it’s a part of is your vehicle’s EVAP (Evaporative Emission) system. It works in conjunction with the charcoal canister to capture and redirect excess fuel vapors so the engine can burn them again.

This reduces your emissions by burning the fuel vapors instead of letting them out of the air, essentially maximizing the amount of energy produced and minimizing the number of harmful chemicals released as a byproduct.

Because it’s effective at reducing the overall amount of harmful emissions, many auto manufacturers have started to implement them into new vehicles to meet rising emission standards.

But when the vapor canister purge valve gets stuck open, you get too much air in the system that wrecks performance. On the other hand, if it gets stuck closed, your emission levels skyrocket.

Part 3 of 3: Test driving the vehicle

After you’ve successfully replaced the EVAP vent solenoid, you’ll be ready to test drive your vehicle. Hopefully you wrote down the symptoms that you experienced that led you to replace this component, because the test drive is designed to verify those symptoms have disappeared. A test drive for this repair is actually very short, due to the fact that in many cases, the failure of this part will show up at idle or start up.

Noted below are a few tips for completing a test drive or verifying that this part replacement was completed correctly.

Step 1: Start the vehicle. Let it warm up to operating temperature

Step 2: Check the dashboard. Verify that the check engine light does not come on. If it does, you should shut the vehicle off and complete a diagnostic scan. The error codes will have to be cleared on most vehicles after completing this service.

Step 3: Shut the vehicle off. After verifying that the check engine or other lights are gone, shut the vehicle off.

Step 4: Remove the gas cap. This test verifies that the vacuum is working.

If you remove the gas cap and there is a tremendous amount of vacuum pressure, re-check the lines you connected to the EVAP vent solenoid as they may be crossed.

Step 5: Take the vehicle on a 10 mile road test. Return home and verify that the check engine light does not illuminate.

This job is fairly simple to complete, however, since you’re working with the EVAP system and fuel system, there may be a few complex steps. If you’ve read these instructions and still don’t feel 100% confident in completing this repair, please contact one of YourMechanic’s local ASE certified mechanics to complete the evaporation vent solenoid replacement for you.

Video

Canister Purge Valve Replacement: Can I Do It By Myself?

You can replace the canister purge valve yourself, but only if you have mechanic expertise and a bit of experience replacing one or two before.

If you are completely new to scrutinizing and fixing an engine part, it could be a difficult task for you. This video could help you understand the purge valve system a little better.

If you are willing to replace the purge yourself, you should be able to find the valve, to begin with.

The location of the purge valve can be a little tricky to identify if you don’t have some prior knowledge about the possible locations of the valve. The spot could slightly vary depending on the engine and primarily on the model of the car in question.

If you are looking at the engine of the car from the front side of the engine, you can inspect the left area of the throttle body, also referred to as the butterfly valve. There, you would be able to find a purge valve on the engine intake. While this is fairly easy to find, another possible spot that might require you to look into is at the back of the fuel tank.

Depending on what type of car you use, if your purge valve is located on the engine, it would not require much time for the complete canister purge valve to be replaced. Yet, if the canister valve is with the fuel tank, it could take a mechanic up to 2 hours to replace the valve.

A purge valve is an integral part of your EVAP system, faults in the replacement could leave to complete engine stalling as well. Hence, all being said, it is always the best practice to trust the hands of a professional mechanic.

Canister Purge Valve Replacement Cost

When you notice the symptoms of a possible bad purge valve and realize you can no longer drive with a faulty one, the first thing that comes to mind is how much might it cost to replace the valve.

In the case of car engine parts, the cost of replacement is comparatively lower than the cost of repairing because of the added mechanic charges.

You may expect to spend anywhere in the range of $70 to $200 in total to completely replace the old purge valve with a new one. The parts only would cost about $40 to $150, depending on where you buy them from. If you add a professional mechanic’s cost, you would need to add another $50 to $100. You can save this money if you are planning to be your mechanic!

When you are planning a budget for your canister purge valve replacement cost, you would need to keep a few factors in mind. Luxury cat fittings and digital sensors surge the price of repair costs of modern cars. That’s why models with PCM might require more cost to replace the purge valve.

Other than the model of the car, your location is what determines how much your mechanic will charge on an hourly basis. In places such as California, the replacement costs are sky-high due to the expensive mechanic rate. Likewise, states like South Dakota and West Virginia mechanics charge a lot lower.

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