Has anyone had to deal with the
P1450 FORD - Unable to Bleed Up Bleed Fuel Tank Vacuum

Read more: https://www.autocodes.com/p1450_ford.html

I had this happen the other day and I'd like to see if I can fix it myself?

Any helpful thoughts would be greatly appreciated.

 

From the WSM:

P1450 - Unable To Bleed Up Fuel Tank Vacuum

Description:

This DTC sets when the evaporative emission (EVAP) running loss monitor detects excessive fuel tank vacuum with the engine running, but not at idle.

Possible Causes:

1. EVAP purge valve stuck open
2. Blockages or kinks in the EVAP canister tube or EVAP canister purge outlet tube between the fuel tank, the EVAP purge valve and the EVAP canister
3. Fuel filler cap stuck closed, preventing vacuum relief (if equipped)
4. Capless fuel tank filler pipe damaged, preventing vacuum relief (if equipped)
5. Contaminated fuel vapor elbow on the EVAP canister
6. Restricted EVAP canister
7. EVAP canister vent valve stuck partially or fully closed
8. Plugged EVAP canister vent valve filter
9. VREF circuit open
10. Damaged FTP sensor

Diagnostic Aids:

Visually inspect the EVAP canister inlet port, EVAP canister vent valve filter, and EVAP canister vent hose assembly for contamination or debris.

Check EVAP purge valve for vacuum leak.

 

Found your post and I am dealing with this now. The valve at throttle body worked and when I put 12v in it with it removed it opened up so that one is good. did you fix the issue? any help would be appreciated

 

I have been troubled with this code P1450(unable to bleed fuel tank vaccum) and still have not found a solution. I have changed the purge flow solenoid as well as the vent solenoid attached to the charcoal canister box. Forsccan data shows 3D 81(blocked evap system line-fault confirmation test) not ready, and 3D 82(vapor blocking valve perfromance) not ready. For some reason it is never able to test. Any idea of what you think can be causing this?