Gas mileage not accurate?

2013 NISSAN PATHFINDER
155,000 MILES • 3.4L • V6 • AUTOMATIC
Avatar
BASHURAKI
  • MEMBER
  • 2 POSTS
So, this is not a really big deal, however, I was curious as to why my vehicle's gas mileage on my dashboard never reads accurately. For instance, if I put gas in and fill it to full, it is most likely going to show a reading around 360 miles worth of gas, even though the gas needle if full to the right. This is not correct. I noticed that if I reset the battery, the gas mileage on my dashboard will then read correctly at around 480-500 miles if filled full.

Like I said, it's not really a big deal, because as long as the gas needle is ready accurately then I'm okay with it. I was just curious about why the reading is always off. Does this have something to do with a fuel gauge sensor, or maybe the fuse?
Sep 13, 2022 at 9:58 AM
Advertisement
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
It is the gas level sensor which wears in time and can change resistance which makes the reading off, or the mileage calculator need an update patch. Also, I would check the air in the tires and clean the MAF sensor. Here is the location of the MAF sensor and a generic guide to show you how:

https://www.2carpros.com/articles/how-to-use-a-tire-pressure-gauge

and

https://www.2carpros.com/articles/mass-air-flow-service

Check out the images (below). Please let us know what happens.
Sep 14, 2022 at 10:24 AM