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Shawn E
Shawn E, Ford Senior Master
Category: Ford
Satisfied Customers: 1707
Experience:  23 Years with Ford, 12 Year Ford Senior Master, ASE Master.
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2005 ford freestar code p1450

Resolved Question:

2005 ford freestar code p1450
Submitted: 5 years ago.
Category: Ford
Expert:  Shawn E replied 5 years ago.
Hi, welcome to my name is XXXXX XXXXX I will be answering your question.


There are multiple causes for this code that deal with the evaporative emission system.


The most likely cause is something restricting the vent tube or the canister purge solenoid itself but this code will require some pinpoint tests to figure out and the possible use of an evaporitive emission smoke machine.



P1450 - Unable to Bleed Up Fuel Tank Vacuum

Description: Monitors the fuel vapor vacuum and pressure in the fuel tank. System failure occurs when the EVAP running loss monitor detects excessive fuel tank vacuum with the engine running (but not at idle).
Possible Causes:
  • Blockages or kinks in the EVAP canister tube or EVAP canister purge outlet tube (between the fuel tank, EVAP the canister purge valve and the EVAP canister)
  • Fuel filler cap stuck closed (no vacuum relief)
  • Contaminated fuel vapor elbow on the EVAP canister
  • Restricted EVAP canister
  • CV solenoid stuck open (partially or fully)
  • Plugged CV solenoid filter
  • EVAP canister purge valve stuck open
  • VREF circuit open (harness near the fuel tank pressure [FTP] sensor, the FTP sensor or the powertrain control module [PCM])
  • Damaged FTP sensor
Diagnostic Aids: Visually inspect the EVAP canister inlet port, CV solenoid filter, and canister vent hose assembly for contamination or debris.
Check EVAP canister purge valve for vacuum leak.



I hope my assistance helped you and resolved your concern, if you need further assistance please ask.

Please note, your Deposit doesn't constitute a payment. Please click the 'ACCEPT' button to allow me to receive credit for my work. Positive feedback and Bonuses are appreciated. Thank you, Shawn.

Customer: replied 5 years ago.
car has a hard time taking fuel it spits back out
Customer: replied 5 years ago.
Expert:  Shawn E replied 5 years ago.
That is an indication that the tank is not venting properly so I would start by checking the vent tube. Sometimes a bug or spider will crawl in there and make a nest clogging the vent. Blow through it with compressed air. It could also be a bad vent solenoid not venting properly.
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