P0441 – Meaning, Causes, Symptoms, & Fixes

Code P0441 Definition

Evaporative Emission Control System Incorrect Purge Flow

Code P0441 Meaning

The evaporative emission control (EVAP) system prevents fuel vapors from escaping into the atmosphere. When the vent control valve opens, the fuel vapors from the fuel tank travel through a vent line to the charcoal canister. The fuel vapors are then absorbed and stored by activated charcoal pellets in the charcoal canister. On the charcoal canister is a purge valve. When the purge valve is opened, the vacuum from the engine draws the fuel vapors out of the charcoal and into the engine intake manifold where it is then used as part of the air-fuel mixture needed for combustion within the cylinders of the engine. However, when check engine light code P0441 is set, the purge valve is not properly regulating the flow of the fuel vapors by allowing too much flow or too little flow.

Symptoms of Code p0441

  • Check Engine Light
  • Rough Idle
  • Erratic Idle

Causes of Code P0441

  • Faulty purge valve (solenoid)
  • Damaged or cracked charcoal canister
  • Loose, damaged, or missing gas cap
  • Damaged or loose EVAP hoses

Code P0441 Severity – Low


Code P0441 does not pose any serious danger to the driver or the vehicle and there are no drivability issues that may occur. However as the case with all Check Engine Light codes, it should be fixed as soon as possible to prevent any further damage to your vehicle.

Code P0441 Common Diagnosis Mistakes

Replacing purge valve (solenoid) without making sure that it is the issue.

Code P0441 Diagnosis Steps

How To Diagnose P0441

  1. Thoroughly inspect gas cap to make sure that it is properly tightened.
    1. Do not forget to inspect the gas cap seal as well.
  2. Visually inspect the charcoal canister to make sure that there are no damages or cracks.
  3. Check the vacuum hoses to make sure that they are all connected securely.
  4. If you have not been able to find the problem in the previous steps, you will need to check your purge valve (solenoid) to make sure that there are no leaks within that system.
    1. You will be using your vacuum pump gauge to test your purge valve
    2. How-to test your purge valve can be found in your car’s service manual or a Hayne’s Repair Manual to find more information on car specific testing procedures. Below (Step 5) is a general guideline.
  5. How to Test Purge Valve (the video below provides more specific information):
    1. Disconnect the vent line connected to the purge valve. The vacuum pump gauge will be connected to the purge valve in place of the vent line.
    2. Pump the vacuum pump gauge to 17 psi. When the vacuum is applied the valve should hold the vacuum and not leak.
    3. If the vacuum drops (the needle on the pump gauge moves), the valve should be replaced.
    4. Apply battery voltage to the purge valve. You should hear an audible click as the purge valve opens, and the pressure on the vacuum pump gauge should drop. If it does not open, the purge valve is faulty and must be replaced.

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Comments 10

Vince McChesney

June 24, 2018

First time using this and I am very impressed. I will be throwing away my old reader. Great job!!


June 26, 2019

Love this product so for,

Dante Green

February 19, 2021

I have my EPC warning light on and its cranks and no start


September 16, 2018

Good find on to fix my car ok


August 28, 2019

The next day, I got a email, explaining what the code was, and what to do about it. It was for me very helpful .And also give me a few tips on what to look for.?


November 20, 2020

Very good test results, I hope to solve these faults by myself. thank you very much!


November 20, 2020

You’re so welcome, Ken! Thank you so much for using FIXD. Wishing your vehicle a quick and affordable fix! 🙂

Janie DeCoil

December 13, 2020

Luv this gadget! How can I save this info to perform these tests later?? I am not able to do it now but want to be able to follow instructions later?

joey gallegos

February 9, 2021

How do you fix incorrect purge flow part is brand nee


October 16, 2018



November 23, 2020

First time the check engine light lit on my truck. Found the place to plug in the fixd adapter. Diagnosed the problem as possible bad gas cap. Noticed that cap wasn’t screwed on tight last time I gassed up.
Took off cap and secured. Started up and check engine light was off. Thank you fixd!


January 20, 2021

So awesome to hear, JK! Thank you so much for using FIXD and for sharing your experience. 🙂


December 17, 2018

The first time I plugged in a ran the analysis, it nailed it. It was the same reading that the Auot Zone computer gave, but my FIXD gave me more detailed info. I’ll be taking care of the problem real soon. This is worth every penny I spent.

FIXD Marketing

December 18, 2018

Hello James,

Thank you so much for your FIXD sensor order! Being a startup, we truly value and appreciate all of our consumers. We are thrilled that you will have a great experience with FIXD, and we are going to continue to work as hard as possible to keep improving the product to make it the most helpful tool for understanding and maintaining your vehicles.

Again we are so thankful for your positivity and support, we hope you continue to love using FIXD!

Thank you,

Randall Casey

June 26, 2019

I used FIXD for the first time today and it nailed it!
My gas cap was loose. Evidently someone was trying to steal my gas.
Now if I could get the check engine reset.

Gilbert Torres

July 3, 2019

Your app is excellent and it clearly explains corrective measures in easy to follow steps.
Mr Torres

John Maden

September 21, 2019

Damn ! Right on the money. It just does not get any better than this. Love my FIXD !

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