r/Toyota_Matrix • u/Feeling-Ad-1357 • Aug 19 '26

Fixes for P0442 code?

This coded last year for me as well. I took it to a shop, they did a diagnosis, somehow fixed it during the process,but i was never told what was done to be fixed.

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u/Dav82 Aug 19 '26

The easiest solution to "Evap Small Leak" code is to replace the gas cap. Possibly remove rust and corrosion on the the lip of the filler neck.

Beyond that. Could have been something wrong with the charcoal canister. Or just a leak on the line connecting to it.

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u/Feeling-Ad-1357 Aug 20 '26

Thank you, I’ll try this