2013 Hyundai Sonata Decrease in fuel tank capacity

Tiny
SOONERFANBELLA
  • MEMBER
  • 2013 HYUNDAI SONATA
  • 2.0L
  • 4 CYL
  • RWD
  • AUTOMATIC
  • 37,000 MILES
Help. Cant get answer from dealership. Can anyone explain why my gas tank had always held around 415 miles to empty when full and now it will only go to 360 miles to empty when full? 13 sonata lmt-no turbo. Bought w/7 miles now 37k. Mntc excellent+use bg lof. May 2015 accident w/$12k in dmg, now repaired included RF unibody/frame dmg.(Not gas tank)Why would tank capacity decrease? Causes?
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Wednesday, September 23rd, 2015 AT 9:23 PM

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Tiny
HMAC300
  • EXPERT
Scan for codes and check fuel pressure then check to see if any of the brakes are dragging or low tire pressure, alignment etc.
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Thursday, September 24th, 2015 AT 6:07 AM
Tiny
ED-WEEZY21
  • EXPERT
I'm just curious, are you strictly going by what the dash is telling you how many miles are left until empty or are you calculating it on your own for each full tank of gas. If you're calculating it on your own, you would need to write down how many miles you physically drove on each tank of gas and then average it out. Just remember, this is just an average because no full tank of gas will ever be exactly the same due to driving habits, weather, etc. If you're going strictly based on what the dashboard is telling you, this is never accurate for some reason and always seems to change. You can have a reading of 360 miles, disconnect the battery for 10 minutes until everything resets on the vehicle, reconnect the battery and then check the reading, and I can almost guarantee you that the number changed even though you did not even move the car. I work for a hyundai dealership and we've had multiple complaints about it and as a technician, I've contacted the Hyundai Techline for explanations and the explanation I'm giving you is the only one we ever get unfortunately. They tell us its just a rough estimate. I personally would just prefer a needle telling me where the gauge is at.
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Saturday, October 31st, 2015 AT 6:08 PM

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