Vw Passat s 2012 evap

Maintenance/Repairs
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1

I have this passat and I’m struggling to fix evap leaks. I have replaced:
Fuel cap
Purge value
Leak detection pump
Drop the fuel tank and reseal the the part where the fuel cap connects to.

I also smoked the car to find leaks and I sealed everything I could see. Yes I smoked every evap line and fuel tank. All the patches and things I replaced helped to remove some codes but I still get: p0456 and p0441. Sometimes I get a warning light the fuel cap is not on but it is. New fuel cap too!

2

Had the same codes on my old Corolla and replacing the charcoal canister fixed it.

3

Really? I haven’t changed it because its 300 dollars. What happens if it isn’t? What else could be the problem? I remember smoking the charcoal canister and nothing leaked.