P0441 code, and can’t pump fuel into tank

[DWilliam]

Oh man...major bummer. I was hoping you had it fixed..

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Thanks, me too. Research on this leads me to believe it’s the canister itself. There’s a new OEM one on eBay for 200 bucks. I might just bite the bullet and throw a new canister in there before I drop the tank and replace the overflow check valve. I’m thinking the canister is blocking vapor from evacuating the system, which is also the reason for the hard start after I fill the tank all the way.

Parts cannon firing away!

 

[brillo_76]

Thanks, me too. Research on this leads me to believe it’s the canister itself. There’s a new OEM one on eBay for 200 bucks. I might just bite the bullet and throw a new canister in there before I drop the tank.

I put a used one in my 2001. It seems to work

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[DWilliam]

Ready to purchase parts.

Asking some of the people who have read this and know my issues (Can’t pump gas, codes 0440,0441,0446): would you put your money on the overflow check valve or the charcoal canister?

 

[King_I3lueberry]

Ready to purchase parts.

Asking some of the people who have read this and know my issues (Can’t pump gas, codes 0440,0441,0446): would you put your money on the overflow check valve or the charcoal canister?

I had those same codes in addition to a p0420 (that hasn't gone away) and I replaced the check valve along with the charcoal cannister on my 2002. Replacing both items and the associated hoses got rid of the p0440, p0441, and p0446.

I do not think anything was wrong with my charcoal cannister but I know the check valve was cracked. It cracks along the seam at the top and was making my 4Runner have a gas smell by the driver side passenger door after driving. I will try to upload a picture here by the end of the night. Dropping the gas tank and replacing the check valve was much cheaper and easier at about $80 from Tustin Toyota vs a few hundred for the cannister. The cannister gave me a lot more trouble tbh.

I would recommend looking at the top of the check valve via the electrical access panel that is under the driver side rear passenger seat. You can access this by removing the seat bottom and peeling back the carpet. You will see a triangle shaped panel with some wiring. Remove the panel and you will see the top of the gas tank. Using a flashlight you should be able to spot the check valve. Once I upload my pic this should make more sense.

I used a normal car jack to lower the gas tank when it was almost empty. I waited until my gas light came on so it would be very light. I did have a helper but my overall opinion is that dropping the gas tank sounds scarier than it is. You do have to be aware of some electrical connections but they should not pose much of a problem. I recommend watching the video by FixItAngel on YouTube

GAS FUMES P0440 P0446 Fuel Check Valve Replacement Toyota 4Runner ? Fix it Angel - YouTube

 

[DWilliam]

I had those same codes in addition to a p0420 (that hasn't gone away) and I replaced the check valve along with the charcoal cannister on my 2002. Replacing both items and the associated hoses got rid of the p0440, p0441, and p0446.

I do not think anything was wrong with my charcoal cannister but I know the check valve was cracked. It cracks along the seam at the top and was making my 4Runner have a gas smell by the driver side passenger door after driving. I will try to upload a picture here by the end of the night. Dropping the gas tank and replacing the check valve was much cheaper and easier at about $80 from Tustin Toyota vs a few hundred for the cannister. The cannister gave me a lot more trouble tbh.

I would recommend looking at the top of the check valve via the electrical access panel that is under the driver side rear passenger seat. You can access this by removing the seat bottom and peeling back the carpet. You will see a triangle shaped panel with some wiring. Remove the panel and you will see the top of the gas tank. Using a flashlight you should be able to spot the check valve. Once I upload my pic this should make more sense.

I used a normal car jack to lower the gas tank when it was almost empty. I waited until my gas light came on so it would be very light. I did have a helper but my overall opinion is that dropping the gas tank sounds scarier than it is. You do have to be aware of some electrical connections but they should not pose much of a problem. I recommend watching the video by FixItAngel on YouTube

GAS FUMES P0440 P0446 Fuel Check Valve Replacement Toyota 4Runner ? Fix it Angel - YouTube

Thanks for your post. I could be wrong but I feel like if I’d check valve was cracked the tank would technically be vented and I wouldn’t have the gas pump issue. However the valve could be stuck closed which is why it’s on my radar. Great idea to check it from the rear seat!

 

[DWilliam]

About to start tackling this. First on my list is a new canister. But first, since I’m having issues where I can’t pump more than 2 seconds of gas before it clicks off, isn’t the gas tank nerved through the canister? So if I remove that connection at the canister and pump gas and it pumps properly, that should verify the faulty canister correct? Can anyone verify which hose I would need to unplug from the canister that comes from the gas tank?

I’m assuming if I unplug that and it still doesn’t vent then it has to be the check valve. Trying to save myself from a new canister if it doesn’t need it.

 

[brillo_76]

You happen to see this thread?

P0440 Fixed!


As it seems identical or extremely similar to your issue.

 

[DWilliam]

You happen to see this thread?

P0440 Fixed!


As it seems identical or extremely similar to your issue.

Yes I have. Just trying to narrow it down because the same symptoms could be because of a bad canister. Dropping the tank would take me an entire weekend.

If I unplug the large plastic hose that runs from the check valve to the canister from the canister, I should theoretically be able to pump gas normally if the check valve is operational correct? If I still have the issue, then it would mean the check valve is stuck closed, right? Seems like a simple way to diagnose it unless I’m missing something.

 

[brillo_76]

Yes I have. Just trying to narrow it down because the same symptoms could be because of a bad canister. Dropping the tank would take me an entire weekend.

If I unplug the large plastic hose that runs from the check valve to the canister from the canister, I should theoretically be able to pump gas normally if the check valve is operational correct? If I still have the issue, then it would mean the check valve is stuck closed, right? Seems like a simple way to diagnose it unless I’m missing something.

Be careful when dropping the tank. I snapped a breather off mine when I dropped it.

I wish I could be more helpful. I just don't have experience on the newer evap systems. Besides swapping mine out that was completely rusted up.

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[DWilliam]

Update: I unplugged the black plastic vent hose that runs from the check valve to the canister and I still can’t pump gas. That should narrow it down to a stuck check valve on the tank right? If that’s where the fumes vent and it’s not stopped by the canister, the check valve is stuck closed, correct?

Here’s the vent hose:
https://imgur.com/a/5ZYZMlX

 

[brillo_76]

Update: I unplugged the black plastic vent hose that runs from the check valve to the canister and I still can’t pump gas. That should narrow it down to a stuck check valve on the tank right? If that’s where the fumes vent and it’s not stopped by the canister, the check valve is stuck closed, correct?



Here’s the vent hose:

https://imgur.com/a/5ZYZMlX

That's my guess.

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[RuggedRunner]

This happened to me. It ended up being the anti siphon ball located on the tank itself. Take the base of the filler off, look inside the tank from there and make sure the ball moves freely. I was able to fix it by sticking a screw driver down the hole and dislodged it because it had gotten stuck somehow and was blocking the gas.

 

[DWilliam]

This happened to me. It ended up being the anti siphon ball located on the tank itself. Take the base of the filter off, look inside the tank from there and make sure the ball moves freely. I was able to fix it by sticking a screw driver down the hole and dislodged it because it had gotten stuck somehow and was blocking the gas.

Where is this? On the side of the fill neck, where the rubber hose connects to the tank? Did you have to drop the tank?

 

[RuggedRunner]

Where is this? On the side of the fill neck, where the rubber hose connects to the tank? Did you have to drop the tank?

Yes, where the rubber hose connects. No need to drop the tank but you will have to crawl up in there to look.

 

[RBs4R]

Following as I have had the same issue on my 2001 for years now, and never dealt with fixing it. It is a secondary vehicle, so have not worried about it much.