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Discussion Starter #1
Driving home this morning my engine light came on. OBD determined it is P1450 Unable to Bleed Up Fuel Tank Vacuum. Anyone have any insight into this? Seems like it's more common with trucks from my quick googling and as I am rather busy today I will have to look into it further later. Thanks in advance if anyone drops some knowledge on me.
 

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Possible Causes:
  • 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
  • Fuel filler cap stuck closed, preventing vacuum relief (if equipped)
  • Capless fuel tank filler pipe damaged, preventing vacuum relief (if equipped)
  • Contaminated fuel vapor elbow on the EVAP canister
  • Restricted EVAP canister
  • EVAP canister vent valve stuck partially or fully closed
  • Plugged EVAP canister vent valve filter
  • EVAP purge valve stuck open
  • VREF circuit open
  • Damaged FTP sensor



Dave
 

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Dave, did you actually find the P1450 code in the manual?
I looked and didn't see squat. For that matter, I didn't see any DTC definitions. This manual is not the best I've seen. No search function. Most topics seem to be only a few pages. If it was printed, I wonder if it would be as big as the owners manual...
 

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Yes, that was from the Service Manual.


Dave
 

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Dave, did you actually find the P1450 code in the manual?
I looked and didn't see squat. For that matter, I didn't see any DTC definitions. This manual is not the best I've seen. No search function. Most topics seem to be only a few pages. If it was printed, I wonder if it would be as big as the owners manual...
I agree it is tough with no search unless you know the correct verbage you will have to look for a bit of time to find what you want..
 

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LotusZX3, question for you. When you stop for gas, how do you fill the tank?

I ask this because a friend of mine used to pump gas in his car and when the pump registered the tank was full (pump handle release click) my friend would insist on adding more gas to "top it up". Unfortunately, this had the negative consequence of fouling his evap canister, causing a CEL and, after doing this over a couple years, he ended up having to replace his evap canister and a couple of other related bits.

Might not apply to you, but often times, what seems like a big problem is solved with a simple solution (or change in fueling habits).
 

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Discussion Starter #7
Thanks for the 411 Dave.

Choccy, I never top it off. I've heard of these problems and even before i always figured topping it off isnt gonna get you that much anyway.

So on Sunday night i fiddled around with the capless fuelly just to make sure it was working properly and i didn't really notice anything wrong. The next morning on my way to Ford the light went off. So I'm guessing it just wasn't sealed all the way....errr or however it is supposed to work. "(Fuel filler cap stuck closed, preventing vacuum relief (if equipped)"
 

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If its a capless then just use your emergency funnel and slide it in and out a few times(lol). Dust and dirt can cause those to not seal properly.
 
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