Possible causes

– Blocked EVAP canister or vent solenoid
– Kinked or collasped hose between canister and fuel tank
– Failed fuel tank pressure (FTP) sensor
– Fuel filler cap stuck closed, preventing vacuum relief

When is the code detected?

Engine Control module (ECM) running system monitor and detected excessive vacuum in the fuel tank/EVAP system

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1450 FORD Description

The Engine Control module (ECM) 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.

FORD Technical Service Bulletins for P1450 code