Hmm, I am not sure about this. The vent valve is located close to the canister itself (should be close to the filler tube above parking brake wire right/passenger side) , the purge valve should be located in engine bay close to the power steering reservoir.
Here is proof, unless ALLDATA is wrong and my experience of these very frequent flyer cars of the day to visit my bay is wrong they should be located right where I said they should be. So here are a few snapshots.
What may have you confused is that they call the vent valve a vent solenoid/valve.
I must mention as I forgot to it's a 2.2 eco tech dohc his other car we are wanting to use for parts is a 2.2 SFI and I think an 02 and am not seeing the sensor on parts car trying to get guy to make time so we can figure it out
We had it put on a pro scanner and could not figure out what was going on as it's throwing such a generic code if the guy brings car back over we are thinking replace the one on top the engine and check lines again the smoker only found the one under car the case was leaking I'm not that good with this type of stuff
Could be the pressure sensor in the tank, I had one a while back checked and replaced a few sensors but never found the problem. I did see pressure differences on my Matco Determinator, (OTC Genisys) but dealer said sensor was stuck. Long story short $215 later it is fixed dealer sensor $80 online $32.
Oh well I know I saw a reading fluctuation when I removed the gas cap per Alldata troubleshooting.