P0452 Error Code

[Spellino]

Originally Posted by dogsridewith

Spellino: Favor to ask:

If overfilling has been the problem and all error codes go away simply w/ first click-off fills, kindly let us know here on YarisWorld. (Or what it does take to resolve the problem) Among other things, it would be good to know how robust our evap systems are.

Good luck and many thanks.

So I think it might it be fixed.

1st I checked the filler tube, it was clean. Then I checked the thin tube that runs from the tank, by the filler tube and ends with an opening near the filler tube opening. I could blow air into that as well.

Then I took off the tube that connect to the cannister from the top of the fuel pump at the end leading to the canister, closed the filler with the cap. Then after a while I opened the cap but there was no gush of pressurised air coming out. Before I took the tube that connects to the cannister, it would come out through the filler tube.

Finally, I took out the tube that end just below the filler tube the medium sized one of the three pipes or tubes. It had a lot of clay that had turned solid in it. I cleaned it up and put it back.

I haven't tested the slow nature of the gas fill up, but the check light hasn't come up again. I'm going to wait a few more days and check on that as well.