Natural Vacuum Leak Detection Solenoid (4.7L)
WARNING: This page is about a different car, the 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
Natural Vacuum Leak Detection (NVLD) canister vent valve solenoid testing perform appropriate NVLD canister vent valve solenoid test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - DAKOTA - 4.7L article.