P1450 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P1450 – Unable To Bleed Up Fuel Tank Vacuum

P1450 Possible Causes

Blocked EVAP canister or vent solenoid

Kinked or collapsed hose between canister and fuel tank

Faulty Fuel Tank Pressure (FTP) sensor

Fuel filler cap stuck closed, preventing vacuum relief

P1450 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)


The Powertrain Control Module (PCM) Monitors the fuel vapor vacuum and pressure in the fuel tank. System failure occurs when the Evaporative Emission (EVAP) running loss monitor detects excessive fuel tank vacuum with the engine running, but not at idle.