CEL and P04F0/P0496 code with gas cap noise

[MavXL]

I’ve seen a few threads with similar issues, but I’m hoping to get some clarity before throwing hundreds of dollars at this issue. A few weeks ago I got a CEL and 2 codes P04F0 and P0496. I also traced a weird groaning sound back to my gas cap and when I pushed the fill tab it was sucking air into the fuel tank. I had the dealer diagnose as it could be a variety of issues. Long story short dealer quoted $900 for “purge valve” replacement or $450 for the part. Since I’m pretty handy I asked to do it myself. Based on @BlueSpec1 wonderful write up there are a few different valves that could ideally fail. Has anyone replaced the “purge valve” which I assume is part # NZ6Z-9D289-A with any success? The part is available online for under $300 but I want to make sure there aren’t other failure points affecting my CELs before jumping in.

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[OleFordGuy]

No idea, but as some info that may or may not be informative:

 

[Chops]

I’ve seen a few threads with similar issues, but I’m hoping to get some clarity before throwing hundreds of dollars at this issue. A few weeks ago I got a CEL and 2 codes P04F0 and P0496. I also traced a weird groaning sound back to my gas cap and when I pushed the fill tab it was sucking air into the fuel tank. I had the dealer diagnose as it could be a variety of issues. Long story short dealer quoted $900 for “purge valve” replacement or $450 for the part. Since I’m pretty handy I asked to do it myself. Based on @BlueSpec1 wonderful write up there are a few different valves that could ideally fail. Has anyone replaced the “purge valve” which I assume is part # NZ6Z-9D289-A with any success? The part is available online for under $300 but I want to make sure there aren’t other failure points affecting my CELs before jumping in.

You may want to ask your dealer if you bought an extended warranty - would they cover this repair?

Dealers love to sell extended warranty’s and you may be able to negotiate a win/win…

 

[Quest]

The only way you can pull a vacuum on the fuel tank is if the vapor management valve is open.
unplug it & see if there's still a vacuum on the tank
If there is then the valve is stuck open
The valve is expensive because it is part of a line that includes check valves
The part # you have is for the entire assembly, that's the only way Ford sells it
The base # for the valve in question is 9C915, look it up on google
You should be able to find just the valve aftermarket & splice it in
There is one for a Focus that looks just like the one in your line but I haven't tried it C1BZ-9C915-A

 

[MavXL]

You may want to ask your dealer if you bought an extended warranty - would they cover this repair?

Dealers love to sell extended warranty’s and you may be able to negotiate a win/win…

Unfortunately I did not purchase an extended warranty and so far I’ve had pretty bad luck finding someone to offer one since I’m pushing 90k miles.

 

[MavXL]

The only way you can pull a vacuum on the fuel tank is if the vapor management valve is open.
unplug it & see if there's still a vacuum on the tank
If there is then the valve is stuck open
The valve is expensive because it is part of a line that includes check valves
The part # you have is for the entire assembly, that's the only way Ford sells it
The base # for the valve in question is 9C915, look it up on google
You should be able to find just the valve aftermarket & splice it in
There is one for a Focus that looks just like the one in your line but I haven't tried it C1BZ-9C915-A

Good looking out! I’ll pull that valve and see what happens. Appreciate the part # insight!!

 

[Quest]

Be warned those plastic lines are hard to work with
You need to really warm them up with a hair dryer or heat gun
And be aware there are fuel vapors unless you remove the assembly

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