After a driving for short period of time, there is periodically a smell of petrol inside the cabin when stationary (stopping for traffic lights, parking etc).
It's there for like 10-15 seconds and disappears when the car moves again. The car in question is a Skoda Superb from 2010 with the 1.8 TSI engine.

 

We have gotten both lambda-sensors replaced by the workshop, but it has not helped on the issue.

 

Any ideas of what could be the reason?

Someone pointed me to that it could be a leaking PCV valve, but would that make sense? 

Edited 28 December, 20241 yr by sriis

I just stumbled upon this video:

 

Would that simple test make sense to do?

I also just found this (however not the same engine and older car):

There are a few ideas here as well:

1. Failing gasket round the fuel gauge sender under the back seat
2. Vacuum reservoir / oil breather pipe leak. Unfortunately the referred threads are dead Briskoda-links. 

Would any of those be relevant for the 1.8 TSI engine?

The smell is clearly coming from the bonnet, so when I stop the car and open the bonnet, there is a petrol smell.
Would a faulty charcoal canister also be something to consider?

 

Any inputs is much appreciated.

FYI, I had the car scrutinised by a Skoda workshop.
They found the active coal filter (connected to the fuel tank) faulty.

I am now waiting to get it replaced under warranty from where I bought the car.