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Sudden higher fuel consumption

Tiny
DONHAR
  • MEMBER
  • 2007 FORD EXPLORER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 94,000 MILES
My 2007 Ford Explorer Sport Trac started using an exessive amount of fuel lately. Dropped from 21mpg to 16mpg within the last 2 month. Already tried new plugs, fuel filter and air filter. A local mech suggested to change the oxygen sensor. Please give me your take on this or have any other suggestions about what to do next.
Thank you much. Don
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Friday, January 28th, 2011 AT 6:25 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
If you have a bad O2 sensor, the check engine light should be on. Have the catalytic converter checked to make sure it isn't plugging. Also, if the check engine light has come on, have the computer scanned to identify what caused it to come on. Finally, have the temp sensor checked.
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Tuesday, February 22nd, 2011 AT 5:20 AM

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