I have a 2007 Hyundai Santa Fe SE the gas gauge is broken which a lot of people report. It has not yet been fixed. But now the truck is only getting 7 miles per gallon!

Edited the first part for clarity.

Hyundai Santa Fe SE 2009 - SYSTEM WIRING DIAGRAMS

https://portal-diagnostov.com > 2020/03/26 > radio-hyu...

Mar 26, 2020 - RADIO - Hyundai Santa Fe SE 2009 - SYSTEM WIRING DIAGRAMS Radio Wiring Diagram, with Amplifier & Rear Seat Entertainment (1 of 2).

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  All Wiring Diagrams for Hyundai Santa Fe Limited 2009

  https://portal-diagnostov.com > 2020/07/22 > all-wiring...
  
  Jul 22, 2020 - All Wiring Diagrams for Hyundai Santa Fe Limited 2009 ; Manual A/C Wiring Diagram (2 of 2) for Hyundai Santa Fe Limited 2009. Rear A C Wiring ...

Hyundai Santa Fe (2006-2012) EMP300RDS pinout

https://pinoutguide.com > ... > Hyundai Santa Fe pinouts

Dec 10, 2019 - Hyundai Santa Fe (2006-2012) EMP300RDS pinout ... Audio Head units > Hyundai Santa Fe pinouts · 24 pin Hyundai Head Unit connector layout

2009 Hyundai Santa Fe Radio Wiring Harnesses - Crutchfield

https://www.crutchfield.ca > ISEO-rgbtcspd > ymm > 2...
Need a radio wiring harness for your 2009 Hyundai Santa Fe? Get free shipping and free lifetime tech support with your order.

check fuse

try a new battery , the old one may seem ok but it's not if a jump start gets the engine going , or the earth connection to the chassis may be bad

The check engine light means you should have the engine computer checked for trouble codes. The gauge problem could be the sending unit in the tank.

Hi Derek,sounds like your fuel sending unit is not working,it states that the fuel pump has everything built within and that has to be replaced.Here a picture of pump,look at picture and the wire with black piece on it is the fuel sending unit,sends signal to gauge letting it know how much gas is in it.Here's a link on it.Here's how to replace fuel pump.

You have a Check Light & You know You Have Codes

Do I need to say more?

Diagnose the codes & resolve code related issues first
& do it when the codes first show up, the same day or next
day or stop using it

On this website you find fuse box diagram and description for Hyundai Santa Fe

Hyundai Santa Fe 2007 2009 fuse box diagram Auto Genius

http://www.hyundai-forums.com/t44393-changing-transmission-fluid-and-filter.htm

4 thumbs up after you read this one!

if it is still under warranty,take it back to them,tell them to fix it right this time, and yes you can reset only if you have a handheld device to plug into you car,still doesn't solve the problem though,"TAKE IT BACK"