2018 V6 TRD - CODE P4055

Any suggestions? out of warranty. Fuel cap??? Truck is pretty much stock other than the air filter i replaced with a K&N a year ago.

title has a TYPO, P0455 and P0441

 

What the code for? How's the rim of your fuel filler? Corroded and pitted?

 

is it P0455?

 

Yes, P0441 & P0455

 

Great points. Also, was tank overfilled? Gas cap rubber seal? I would clear both codes and run it. What's the mileage on this truck? Your Emission warranty might cover it.

 

55k mileage currently.

 

Here is what a simple search turned up.

'The P0441 OBD-II code is relatively rare (at least for Toyotas). It indicates an Evaporative Emission Control System Incorrect Purge Flow."
https://parts.olathetoyota.com/p0441-code-toyota

"There are many things that can cause the P0455 trouble code to trigger in your Toyota Tacoma. Here are the most common problems that will throw the code:

• Evap System Hose– The hose that carries the fuel vapor from the fuel tank to the intake manifold can begin to leak. This will cause the P0455 code. Look for either a tear or hole in it. This is one of the most common issues that causes the code
• Vapor Canister Purge Valve– One of the most common causes of the P0455 code is the vapor canister purge valve. It’s really easy to replace. There are a few clips that you need to find and remove.
• Faulty Charcoal Canister– The charcoal canister is often the cause of P0455.
• Fuel Tank Sending Unit– It is possible for the gasket that attaches the fuel sending unit to the gas tank to go bad. This can reduce tank pressure and throw the code.
• Fuel Cap– A bad fuel cap can cause the code to be thrown for sure. Often, you’ll get a message informing you that the fuel cap is off even when it is on. If you are getting that message, plus a P0455, it may save you a ton of time and money to replace the fuel cap and see if it goes away.
• Fuel Filler Neck– There is often a gasket where the fuel filler neck connects with the gas tank. This gasket can dry out, especially with vehicles that spend their time in dry climates. When it dries out, the fuel tank can’t hold pressure anymore.

https://www.700r4transmissionhq.com/p0455-toyota-tacoma/

 

I read that website already. Identifying the parts is a different story. Where exactly are the items i should be looking for?

 

I think i found the vapor canister purge valve.

 

Emissions are covered to 80,000.

 

are you sure on that?

 

Yap

 

Yes but only the components marked 8/80 are covered to 80k it looks.

 

Yap. You right

 

???

 

Looks like the two easiest things to change are the fuel cap and the vapor canister purge valve. Im going to start there i guess. truck spends the majority of its life driving the highway.

 

OP where's the purge valve? By the tank or under the hood?