what is the ventilation switch? is that the roll over valve or the charcoal canister? I have a 99 non turbo and need to fix it. I'm not sure what is is. Im guessing its the small one in the fender the one between gas tank and spare or the charcoal canister. and help will be great thank you. its code p1494 evap ventilation switch or mecanical fault

Ventilation switch? You mean the evap solenoid?

umm. The code at autozone came up as "definition: EVAP ventilation switch or mechanical fault"
"possible cause: 1)Open or short circuit condition. 2) Poor electrical connection. 3) Failed Vent solenoid 4) Vacuum hose plugged"


I just don't know where to start. I don't want to start taking things off and risk braking them or braking hoses and need to replace them all. if i need to i will but need some where to start and just don't know where its talking about.

What is the powertrain code?

P1494