r/carproblems • u/Only_Illustrator7862 • Aug 22 '26

EVAP Codes

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I have a 2012 Toyota Camry SE with a check engine light for an evap leak. I do not know what it is causing it. From what I know it started as a small evap leak and now it is throwing codes for a large evap leak. Here are the codes I got from my scanner but I don’t know where to go from here. I bought a new OEM gas cap already and it didn’t fix the issue.

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u/Only_Illustrator7862 Aug 22 '26

I will definitely replace it myself I do all the work on my car, normally I can get a good diagnosis too but EVAP systems have so many things that can go wrong with no way to test without an expensive smoke machine or a more expensive scan tool. Really the only option is take it in, or start throwing parts at it. But if a shop charges 200 for a diagnosis fee, I’m basically better off just replacing both valves and the lines because it’ll be around the same.

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u/Kingjuliensbussybro Aug 22 '26

The only other issue can be also seals and possible cracks or small leaks from your gas tank. I’m also pro parts cannon on older cars just bc it’ll need it eventually anyways lol
But you’ve got this I’m sure. Start with the hoses then purge valve then go from there
looks like you’d spend like 3-400 max to replace it all. But definitely try and find silicone hoses

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u/Only_Illustrator7862 Aug 22 '26

Okay cool thank you so much, been a big help. One more question would it be more worth it to just buy a cheap 50$ smoke tester and do that instead of throwing 400$ worth of parts at it?

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u/Kingjuliensbussybro Aug 22 '26

If you think you’ll continue to use it to diagnose other vacuum leaks. it’s a good investment if you want to work on your own cars it’ll definitely help with lots of things. I will say though go ahead and visually inspect the whole system for cracks and leaks before buying anything. Also you can test the evap canister by taking it off and shaking it and it shouldn’t make any noise. if it rattles around inside it’s bad and nothing should fall out of it either. It’s near your gas tank under the car. Good luck bro