DTC P0451: EVAP System Pressure Sensor Range/Performance Problem

Perform basic diagnostic procedure. See BASIC DIAGNOSTIC PROCEDURE . If any other DTCs are set, diagnose and repair those DTCs first. If DTC P0451 is only DTC set, turn ignition off. Check fuel filler cap for tightness. Check for disconnected, leaking or plugged vacuum hoses and pipes between fuel tank and fuel tank pressure sensor. Check for disconnected, leaking or plugged air ventilation hoses and pipes between fuel tank and fuel filler pipe. Repair or replace components as necessary. If all components are okay, replace fuel tank pressure sensor. Clear memory and perform verification procedure. See CLEARING DIAGNOSTIC TROUBLE CODES  and VERIFICATION PROCEDURE  .