Auxiliary Emissions ControlOBD2 Codes

P0441 – Meaning, Causes, Symptoms, & Fixes


What Does Code P0441 Mean?

  • P0441 definition: Evaporative Emission Control System Incorrect Purge Flow
  • Issue Severity: LOWContinued driving for a short period of time is okay
  • Repair Urgency: Get this code addressed within the next month.
  • Diagnosis: It is important to complete the entire diagnostic process when diagnosing the P0441 code. This DTC can be triggered by a faulty EVAP purge valve; a loose, missing, or damaged gas cap; or damage to the charcoal canister and/or EVAP hoses.

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.

P0441 Causes

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

P0441 Symptoms

  • Check Engine Light
  • Rough Idle
  • Erratic Idle

How Do I Fix Code P0441?

With a P0441 code, the first step is to get it properly diagnosed to figure out what is causing the malfunction in the evaporative emission control system. Using the live data function of the FIXD sensor and app allows you to read and analyze engine data to properly diagnose a P0441 code.

If the sensors are all reading correctly and you’re not comfortable further diagnosing this issue at home, we recommend finding a RepairPal-certified shop to pinpoint the problem and give an accurate estimate for repairs. 

These shops can not only help you figure out what’s going wrong before you waste time and money on the wrong parts, but they also offer a minimum 12-month, 12,000-mile warranty and stand behind all their estimates with guaranteed fair pricing.

> Find a RepairPal Certified Shop Near You

How Much Does It Cost to Fix Code P0441?

If you take your car to a shop for diagnosis, most shops will start with an hour of “diag time” (the time spent in labor diagnosing your specific issue). Depending on the shop’s labor rate, this typically costs somewhere between $75-$150. Many, if not most, shops will apply this diagnosis fee to any required repairs if you have them perform the repairs for you. From there, a shop will be able to give you an accurate estimate for repairs to fix your P0441 code.

Possible Repair Costs for P0441

When it comes to making repairs associated with the P0441 code, one or more of the below repairs may be needed to solve the underlying issue. For each possible repair, the estimated cost of repair includes the cost of the relevant parts and the cost of labor required to make the repair. 

  • EVAP purge valve: $
  • Charcoal canister: $
  • Gas cap: $
  • EVAP hoses: $

DIY Steps to Diagnose Code P0441

If you’d like to try to fix code P0441 at home without throwing money at parts, you’ll want to follow the steps below for proper diagnosis. Complete diagnosis may require some specialized equipment beyond what the FIXD Sensor can provide, but for the most part, this diagnosis and repair can be attempted by beginner DIYers. 

DIY difficulty level: Beginner

This repair can be attempted by beginner DIYers.

Tools/parts needed (our top picks from Amazon):


Scan your vehicle to verify P0441 is the only code present. If other codes are present, they must be addressed first.


Visually inspect the charcoal canister to make sure that there are no damages or cracks. Check the vacuum hoses to make sure that they are all connected securely.


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. You will be using your vacuum pump gauge to test your purge valve The how-to test for 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. Here is a general guide for testing this electronic valve:

  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.

If at this point the vehicle is still setting the same code, you may have a more serious problem with your car’s oxygen sensor system, and you should bring the vehicle to a certified shop to have further diagnostic work performed.  

Common P0441 diagnosis mistakes

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

Still Need Help Fixing Code P0441?

If you’ve followed the steps above and are still experiencing issues with the oxygen sensor system and code P0441, please contact the FIXD Mechanic Hotline if you’re a FIXD Premium subscriber or find a RepairPal certified shop near you to get the right repairs at a fair price.


Lifelong automotive enthusiast with a soft spot for offroading. Wrencher turned writer, but I still love to tinker on just about anything with an engine. Dream car: tie between a ‘71 Hemi ‘Cuda and a ’91 GMC Syclone. #GirlDad #SaveTheManuals

Jeffrey N. Ross
Lifelong automotive enthusiast with a soft spot for offroading. Wrencher turned writer, but I still love to tinker on just about anything with an engine. Dream car: tie between a ‘71 Hemi ‘Cuda and a '91 GMC Syclone. #GirlDad #SaveTheManuals

You may also like


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

    1. Love this product so for,

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

  2. Good find on to fix my car ok

    1. 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.?

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

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

    3. 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?

    4. How do you fix incorrect purge flow part is brand nee


    1. 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!

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

  4. 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.

    1. 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,

  5. 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.

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

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

  8. replacing gas cap does not clear code – please advise

  9. Fixed my P0441 by replacing the EVAP fuel tank pressure sensor. It was easy to get to in my Hyundai Entourage; there was an access panel to the top of the fuel tank under the driver-side middle seat.

    1. Hey John, that’s great to hear! Thanks for sharing this fix for others!

Leave a reply

Your email address will not be published.