Question about Hyundai Motor 2002 Elantra

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It shows that code p1166 oxygen sensor has been changed and code keeps showing,emissions high I really dont know what else to do, we also try with another ECU and still turn the service engine light.

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It showing you this fault, but sounds like your car is putting off out too much fuel mixture. Check your PCV valve along with the other components that recirculate the emissions.

Posted on Feb 25, 2010

  • Chris Busby
    Chris Busby Feb 25, 2010

    Also your converters may be defective. May be letting to much emission pass through.

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Also it would be worth your while to scan it with a TECH 2 scanner......You may have one I dont know......But I worked for Buick/Pontiac/GMC for 5 years and TECH 2 was a life saver...
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