Question about 2009 Hyundai Sonata

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I have been to huyndai dealer many times the have changed the engine sensor and a lot of other stuff but the light comes back on for about 2 hours then turns off and i dont know what to do anymore please help me its driving me crazzyyyyy.

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Change the fuel cap.

Posted on Jan 13, 2011

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Posted on Jan 02, 2017

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Dear Gandhi
1) You better check the 'Idle control relay' - and pray this is not your computer - who may be shorted ( The Computer that govern all elec. functions in the car - is also getting signals from your Mothor Mounts' to ensure a more balanced ride' If one or more of the Motor Mounts ( There are 3 ) are defective - they send a signal to the computer - and the yellow light ( Check engine soon) - will appear'
2) A Computer can only be fixed by a Nissan dealer ( est. $750 ) 3) The Idle control valve - can be adjusted too ( Again - by a Nissan Dealer only .
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Sorry I don't have better news today .

Best of luck
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