Canister Vent Solenoid
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2002 Mercury Sable, 2002 Mercury Mountaineer, 2002 Mercury Grand Marquis, 2002 Mercury Cougar, and 2002 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition off. Disconnect Canister Vent (CV) solenoid wiring harness connector. Using a DVOM, measure resistance between CV solenoid terminals. If resistance is not 48-65 ohms, replace CV solenoid and repeat QUICK TEST in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article. If resistance is 48-65 ohms, solenoid is okay. If fault is still present, perform TEST HX: EVAPORATIVE EMISSION MONITOR & SYSTEM under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article.