Unable to Bleed Up Fuel Tank Vacuum
2010-2012 Ford Taurus 3.5L V6
Description
The EVAP running loss monitor has detected excessive vacuum in the fuel tank. The system is unable to relieve the vacuum, which can be caused by a stuck canister vent solenoid, blocked EVAP hoses, or a stuck fuel filler cap. Very common on Ford vehicles with capless fuel systems.
Symptoms
- Check Engine Light
- Possible difficulty refueling
- Hard starts after refueling
- Slow fuel fill
- Possible stalling in cold weather
Common Causes
- Canister vent solenoid stuck closed (most common)
- EVAP purge valve stuck open
- Kinked or collapsed hose between canister and fuel tank
- Stuck fuel filler cap
- Capless fuel filler flap sticking
- Faulty fuel tank pressure sensor
- Contaminated charcoal canister
- Plugged vent valve filter
Diagnostic Steps
- Check fuel tank pressure sensor voltage (should be ~2.6V KOEO; if lower, remove gas cap to see if voltage rises)
- Inspect canister vent solenoid for proper operation
- Check EVAP purge valve — command closed with scan tool and verify
- Inspect all EVAP hoses for kinks or collapse
- Check fuel filler cap or capless filler for proper operation
Repair Notes
Replace canister vent solenoid (most common fix, ~$24 part). Check for stuck purge valve. Inspect hoses for kinks.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1450 on Other Vehicles
Common Questions
What does code P1450 mean on a 2010-2012 Ford Taurus?
P1450 stands for "Unable to Bleed Up Fuel Tank Vacuum". The EVAP running loss monitor has detected excessive vacuum in the fuel tank. The system is unable to relieve the vacuum, which can be caused by a stuck canister vent solenoid, blocked EVAP hoses, or a stuck fuel filler cap. Very common on Ford vehicles with capless fuel systems.
What are the symptoms of P1450 on a Ford Taurus?
Common symptoms of P1450 include: Check Engine Light, Possible difficulty refueling, Hard starts after refueling, Slow fuel fill, Possible stalling in cold weather.
What causes P1450 on a 2010-2012 Ford Taurus?
Common causes of P1450 include: Canister vent solenoid stuck closed (most common), EVAP purge valve stuck open, Kinked or collapsed hose between canister and fuel tank, Stuck fuel filler cap, Capless fuel filler flap sticking, Faulty fuel tank pressure sensor, Contaminated charcoal canister, Plugged vent valve filter.