On my 2013 F150 the fuel gauge will only read 3/4 tank when you fill it up. Any idea what's causing this?

 

It could be a variety of things. I know sometimes if I ran really low, then filled up, it would do this.

But it would correct it self after a day or two.

If I recall correctly, it's only done it once on my F150.

Back when I had my '03 Escape, and a '02 Windstar, it would do this more frequently. But time would correct it.

 

I moved this into the Electrical section, because I think you may get more help here.

Has it always read low when the tank is full or is this something that's just started? If it's a new problem, I'd suspect faulty electrical connections somewhere. But I haven't a clue where you would start looking. I suppose a dealership would try a new gauge as a first step, which would either eliminate the gauge itself as the problem or fix it. I have no idea how the fule sensor in the tank works, but that would also be a likely source of the problem.

When you drive the truck, does the fuel gauge stay at the 3/4 mark for a long time (I'm guessing maybe 150 miles) before beginning to drop? And, when the gauge reads, say, about 1/4, does it seem to take 3/4 tank capacity to fill it back up?

This might be something you can just live with, if you understand how to interpret it.

- Jack

 

It's only been doing this about 2 months. I've been told it might be the fuel pressure sensor.

 

I wouldn't think fuel "pressure" sensor, but the sensor in the tank that signals level of fuel could certainly be faulty.

- Jack

 

My 2013 f150 is doing the same. Fill up reads 3/4. 1/2 tank, 1/4 tank, empty are accurate.

Been that way for about 6 month. 1 month ago I got an error code indicating my canister purge valve was bad. Replaced it, error went away and all of the sudden fuel guage started reading right again. 2 fill ups later and I'm back to the 3/4 after fill up

 

Check the electrical connections for corrosion.

 

Hello! Send us a private message with your F-150’s VIN and name & location of dealership. I’d be happy to see what I can do to assist with this fuel gauge concern. Thanks!