2024 Tacoma with 5100 miles with gas tank issue??

Agree. They went the easy way out by placing blame and not trying to solve the problem.

 

^^^ what he said it’s been a known issue on the 3rd gen for years when the pump clicks stop your done no trying to fill more. Also your filler cap make sure you get 1-2 clicks to close it. Guess this issue has now passed to the 4th gen guys and gals.

 

What exactly is the failure, what codes are present? I spent a lot of time tracking down an EVAP issue on my Toyoita land Cruiser. First failure was the Evap canister was saturated, I have a spare tank that made it work harder. That and wheeling a lot in Utah makes the gas boil creating a lot of vapors. That isnt really relevant here

What is relevant is when I put it back together after replacing the EVAP, I still had codes and it took me a while to track it down. It ended up being a loose connection, but I found a leak anywhere will cause a code.

The codes for EVAP internal sensor failure vs leak can help diagnose what is going on is why I ask what codes. Somoeone would have pulled them.

 

Wow. I am glad to be reading this, because I have never had a vehicle that suffered from this -- and had been thinking that with the smaller gas tank on this thing, I'd be filling it up as much as possible each time.

No more of that thought.

 

I'm not sure of the exact codes, but I should have more info from the non-Toyota place by Monday or Tuesday. I will let everyone know. I'm wondering if because the truck sat on a slight hill for five days with a full tank, could the issue have occurred then? The Toyota folks say no, but I'm wondering about this.

 

If they did not present you with specific data showing that you attempted to overfill the tank and you didn’t offer that yourself, then they’d have no basis to deny a warranty claim. It’s not their business to throw accusations, just the fix the truck.

 

Maybe this will help you. You can also get codes with a loose or bad gas cap

The charcoal canister is the same as an Evap canister.

Here's a breakdown of common EVAP codes and potential causes: This is not a 100% complete list
Common EVAP Codes and Meanings:

• P0441: Evaporative Emission Control (EVAP) System Incorrect Purge Flow
• P0442: Indicates a small leak in the Evaporative Emission Control (EVAP) system.
• P0455: Indicates a large leak in the EVAP system.
• P0456: Indicates a very small leak in the EVAP system.
• P0457: Indicates a fuel cap issue (loose or off).
• P043F, P043E, P2401, P2402 and P2419 can also map to a bad EVAP canister or purge valve

Possible Causes and Troubleshooting:

• Fuel Cap Issues:
  • Loose or Missing Cap: Ensure the fuel cap is properly seated and tightened.
  • Damaged Cap: Replace the cap with an OEM (Original Equipment Manufacturer) cap if the current one is damaged or doesn't fit correctly.
  • Aftermarket Cap: Using a non-OEM cap can sometimes cause issues with the EVAP system.
• EVAP System Components:
  • Fuel Tank Vent: Inspect the fuel tank vent and related hoses for leaks or damage.
  • Charcoal Canister: Check the charcoal canister and its connections for leaks or damage.
  • Purge Valve: Ensure the purge valve is functioning correctly.
  • PCV (Positive Crankcase Ventilation) Valve: A faulty or "stuck" PCV valve can also trigger EVAP codes.
  • • Other Issues:
      • Short Circuit: A short circuit in the EVAP system's wiring can cause problems.
      • Faulty Sensor: A faulty EVAP system sensor can send incorrect readings to the computer.

Here is a brief description on how a Toyota EVAP system works. Think of it like you would water flow in your house and how the vapors from the fuel tank go through the Canister. If for example the purge solenoid isn't working or the freshh air solinoid isnt working you can see there is no place for the vapors to go.

The other thing to know is Toyota EVAP systems do a test when your vehicle is off it will create a vacuum in the system and if it detects a leak like gas cap or hose, it will set a code. One way to tell if its the test is to clear the codes and drive. If the codes don't come back after driving before the truck cools down, it may be the overnight test that is setting the code. My baad EVAP code only came after the teest ran. Toyota can initiate this teest with Techstream. This test doesnt run every night, it runs after so many miles, so many starts and stops and when the temp of the engine cools down. I had to troubleshoot this in my Land Cruiser and it took sometimes 3 days to initiate the overnight test.

blah blah blah- why amd I asking you about this? When the code happens and how it happens along with what code can help really dive in on what the problem is. This can only help with your discussion with Toyota. You are more likely to win any discussion if you speak with data, even if you don't fully understand it. What I suggest is you have your current mechanic tell you exactly what codes are set, if they happen immediately or from the overnight test. Then when they diagnose it and fix it ask him if that could be from overfilling. Ask them to keep any removed parts in case needed to build your case. I would come back here with all this info and some of us may be able to help you build a case.

 

Got it. Thank you so much for the detailed notes. I really appreciate it! I will talk to the non-Toyota dealership mechanics tomorrow. We already haven't had the truck for a week and it looks like it's going to be at least another week before this is figured out.

 

Just out of curiosity do these new trucks pump fumes from the tank like the 3 gens did? If so, maybe it is pulling a vacuum in the tank. Thus not letting gas flow as it should, causing it to stall?

Hopefully you get this figured out soon!
Good luck!

 

Did you read her post that said she never went beyond the first click EVER?

 

Maybe,but she may not be the only one driving the truck,she refers to we in her post.

 

Unless Toyota can prove beyond a shadow of a doubt that it was overfilled, the EPA may wish to have a word with them on emission warrantied items that are absolutely required and mandated to work as intended. This ''whoops, the tank ''may'' have been overfilled by ''someone'' doesn't really cut it in the emission department, that is piss poor engineering and putting the canister lower then the tank, ever wonder why the charcoal canister used to be reasonably high up in the engine compartment? Now you know...

 

Wow. The fact that they're blaming this on you without proof is ridiculous. Make them show you how it's your fault. We shouldn't have to build a case everytime something breaks. 5100 miles you've probably only filled it up 20 times???

 

The latest is the non-Toyota dealership specialty place could not recreate the issue and get this said the charcoal canister is NOT damaged. I have now parked it on my hill again with a full tank exactly like last time and will leave it parked for five or six days. It was not overfilled either time. I'm wondering if this is causing the issue. I will take it back to the non-Toyota dealership place for them to check on it again. This is probably all of out of my pocket, but I don't know what else to do at this point. I just want to know what caused the car to stall like that!

Toyota corporate said they are going with the word of the two dealerships who said we overfilled the gas tank and caused the issue. I couldn't believe it. They are refusing to send the field specialist they have to check on the truck.

They have a branch within Toyota that works with customers who feel they have an unsafe vehicle. I'm going this route now to see if they will then send a specialist to check it out at the very least or possibly buy back/replace it.

 

Submit a complaint to the NHTSA.

https://www.nhtsa.gov/vehicle/2024/TOYOTA/TACOMA/PU%252FCC/4WD

 

Toyota really doesn't understand that when I read stuff like the OP's experience with a new Toyota truck, I start rethinking my possible purchase of one because NO vehicle should have a known issue like this that they refuse to cover. It's toyota's fault they mounted the charcoal filter lower then the gas tank and plain stupid to boot if it can't handle ANY wetness, off angle driving/parking, and costs almost $2000 and will cause it to fail a federal emission test.

Why would I sell a 2nd gen and buy that instead?

 

The overfilling and damaging the charcoal filter isn't just a toyota thing, it's a most modern vehicles thing.

 

What Toyota dealers have you dealt with on this issue?

 

Charcoal filters used to always be above the fuel tank. You didn't hear of this or if you did, it wasn't after one time and maybe a few thousand miles. Sometimes fuel nozzle auto shut off's fail, sometimes you have to fill out of a can, it WILL happen at some point to almost every owner. 2K is ridiculous. 50K miles and the filter is bad after multiple overfills, I can see that, 1000 miles and MAYBE once, absolutely not, that is called a defect that causes a failed emission system which MUST be covered for literally a decade and hundreds of fills.

 

But per the OP, it sounds like this didn't happen. and something else is the issue. Toyota is just saying it's the canister, but the other shop is saying the canister is fine. I'd bet toyota is just making the assumption based on codes or symptoms. We'll just have to wait and see what it really ends up being.