2007 Hyundai Elantra Poor Gas Mileage

2007 HYUNDAI ELANTRA
42,000 MILES • 4 CYL • 2WD • MANUAL
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When I first purchased this car I was getting 35-38 mpg. I hadn't check the mpg in about 6 months to 1 year. Then my wife got in a fender bender with it. Now we are getting about 27-29. The car seems to run fine, maybe slightly rougher but I don't think it is related to accident. So now my question is two part: What can I do to investigate the MPG loss? Some one told me to clean the O2 sensors, Where can I find those?
Mar 4, 2009 at 10:21 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi:
The sensors are on the exhaust manifold and the exhaust, before the catylatic converter.

Has the engine light ever come on? After the accident, have you heard any rattleing from the exhaust?

Let me know.

Joe
Mar 6, 2009 at 10:40 AM
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