1.6 16v / fuel overflow & emissions control fault

[GreyhoundHH]

Hi there,

we're currently facing two issues with our family car: 1.6 16v (2007, ~185K km).

#1
With warmer temperatures, the fuel tank overflows after some time when we've been to the gas station.
Even with some litres of gas burned/driven the gas rises in the filler pipe and drips out over the rim.
Obviously the warm temperatures make things (gas fumes) expand. But this should be compensated somehow, right?

Every workshop I've talked to has never heard of that problem..

#2
The car is sporadically showing "emissions control fault" (not sure about the englisch term, in our German car it's "Anomalie Abgasreinigung") right after start and tends to run a bit rough then. With the next start the issue might be gone... We had this issue a couple of times last summer and it did not reoccur until last week.


Is it possible that these problems are somehow connected and maybe related to a faulty "(Vapor canister) purge valve"?
After some research on my own this seems to be my best guess so far...

Any help is appreciated!

Regards