yeah it came on the other day,i have a scanner and the code was
p1426 (tank vent valve open) sois this an easy fix or not

 

Not sure what a tank vent valve is, but make sure your gas cap is tight and sealing.

 

Its possible the purge valve connector is improperly connected. The purge valve is a little cylindrical device with a wiring connector and two hoses sitting on top of the air filter housing. Seeing as how they're working in thei vicinity for the turbo replacement, its a good change that something is disconnected with regards to the purge valve. Or, it is broken.It the hoses aren't connected properfly

 

I have same code on my 01 S4, tank vent valve open, I checked connections and cleared codes but keeps returning. Where can I get this tank vent valve stealership only?

 

no its above the airfilter,juat remove the top cover and look around,i did just that and it really was a loose connector then i eraced the light and it never came back

 

I checked connections, still getting P1426 - tank vent valve opened. It's not effecting performance. I guess I need to replace the sensor, or could it be just a leaking hose?

 

Any thoughts? Still getting p1426 code, connection good. Should I just replace sensor?