sensor on air box?

[ian52]

what is the sensor or whatever it is on the airbox nearest the wing that has a hose coming out of it that goes away into the wing and has a 2 wire plug going into it?are these the same on all petrol 1.8 a4's?

 

[Siena]

Active Charcoal Canister purge valve?

 

[ian52]

sounds about right.what exactly does it do?

 

[Siena]

It vents vapour from the fuel tank, the valve releases these vapours into the intake manifold, and it's burnt.

 

[NHN]

what is the sensor or whatever it is on the airbox nearest the wing that has a hose coming out of it that goes away into the wing and has a 2 wire plug going into it?are these the same on all petrol 1.8 a4's?

I wouldnt mind seeing this as I was sure the charcoal was on other side, just curious, can you post a pic of what you mean please.