Got a CEL tonight
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Resident smarta$$
Joined: Aug 2006
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From: Oaks,PA
Got a CEL tonight
Plugged in my SCT when I got home, P1450 code. "Unable to bleed up fuel tank vacuum" I did a search here but nothing in the 09-up section. Google search provided this from another forum
P1450 Error Code Excessive Fuel tank Vacuum - Ford F150 Forum - Community of Ford Truck Fans
I'm still googling but it seems I need to start by cleaning out the lines and evap which I'm not sure where its located. I'm going to get on a creeper tomorrow morning and have a peek but just wanted to see if any of my brothers ( or sisters ) here have had this issue. I just turned 35K miles, and I also just made my last payment, wtf right?
TIA for replies 
P1450 Error Code Excessive Fuel tank Vacuum - Ford F150 Forum - Community of Ford Truck Fans
I'm still googling but it seems I need to start by cleaning out the lines and evap which I'm not sure where its located. I'm going to get on a creeper tomorrow morning and have a peek but just wanted to see if any of my brothers ( or sisters ) here have had this issue. I just turned 35K miles, and I also just made my last payment, wtf right?
TIA for replies
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Resident smarta$$
Joined: Aug 2006
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From: Oaks,PA
OK so here is what I found so far. Nothing appeared to be kinked or broken, however there was one screw that looked to be missing on the side facing the rear, bottom right corner. 3 blue screws( #s 9, 10, 14) the bottom right one on the cover "appeared" to be missing (#6 on the diagram). There was a hole there with no screw in it so I found one in my spare screw bin and put it in the hole and cleared the DTC. Drove it this morning and so far no CEL so fingers crossed that it was something this simple. Thanks for all the replies 
Cargo Master
Joined: Nov 2011
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From: Northern California
Sorry to hear about the issues brother! It would be great if just a simple screw would solve the problem. After reading about this code there are a lot of things it could be..but mostly people have talked about a vent restriction. It sure also seems this is a complex test the truck runs before it throws the code.
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Resident smarta$$
Joined: Aug 2006
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From: Oaks,PA
Thanks buddy. It's due for inspection next month if it persists I'll let my mechanic deal with it. I read some of the tests and issues and I'm hoping it was just a hiccup. The thing is, I was meeting the foreman I've been working with at a park and ride at 5 am then we continue to Maryland to the job we've been on for the last 6 weeks (almost 2 hrs down and more coming home). Maybe it's just a coincidence but my d-bag ex brother in law lives close to where my truck was parked for almost 12 hrs a day unsupervised. I hate to think like that but he dumped a bunch of water in the gas tank of my sisters Durango in the middle of last winter among a hundred other shady things he has done. I guess time will tell, the light is off as of now
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Resident smarta$$
Joined: Aug 2006
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From: Oaks,PA
Hopefully not but I wouldn't put it past him. I'm done working in MD, my truck isn't parked there any more so I'll see what happens. Fingers crossed
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Logistics Pro
Joined: Jan 2005
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From: penn twp.
Water or sugar in the tank won't cause your issue. But they will cause other more serious and harmful at least to your truck and wallet issues. The issue you are having is purely evap related. Most common to either a kinked/pinched vacuum line. Or dry rotted rubber evap/ fuel line. Other things that can cause this issue are a faulty gas cap. Faulty vapor valve, or other sensors in either in the tank or fuel/evap system. Most common symptom of this fault is (if your truck has a gas cap) when you take the cap off at the gas station you'll hear a hissing sound as the pressure is released. And if it's real bad you'll feel the pressure release in the form of the vacuum trying to pull the cap back onto the filler neck. To me this is just a PITA code. More often than not it's just one of those things to cost you the owner more money and headaches in the name of being green. It's needed with having a totally vapor leak proof fuel system that vehicles have had to deal with since the late nineties.
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Resident smarta$$
Joined: Aug 2006
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From: Oaks,PA
I know that stuff in my tank won't cause that issue I was just using the example of what he did to my sisters car. He's an engineer so he is no dummy and I trust him as far as I can throw him. Its probably coincidence but I just can't help wondering. No gas cap, no kinked lines that I see. I'll wait to see if the CEL comes back on, I'm not even driving it this week the foreman I'm working with is picking me up at the house- its on his way to the job
Postmaster
Joined: Feb 2014
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From: Hattiesburg, Ms.
I know that stuff in my tank won't cause that issue I was just using the example of what he did to my sisters car. He's an engineer so he is no dummy and I trust him as far as I can throw him. Its probably coincidence but I just can't help wondering. No gas cap, no kinked lines that I see. I'll wait to see if the CEL comes back on, I'm not even driving it this week the foreman I'm working with is picking me up at the house- its on his way to the job
Logistics Pro
Joined: Jan 2005
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From: penn twp.
My 98 Expy has this issue. I tracked it down to being a faulty sensor that is in the top of the fuel tank. However it's a plastic tank and the sensor is molded into the tank. Now I can buy the sensor. But to replace it I have to break it loose from the tank. Or I can buy a new tank for it. But it's pricy and no one will say for sure if it's included in the tank or not. The recommended repair is to replace just the sensor and epoxy the new one into place. But not sure how quickly the fuel will break down the epoxy and don't want another headache. So I found if I don't tighten the cap til it clicks it won't throw the code. Also their should be a sensor in the charcoal canister that is serviceable. That too goes bad and can cause this issue. Not certain if your truck has that type of set up, but you might want to start there. Keep us updated as to what the problem end us being.