my 2009 hyundai sonata 4 cyl light just came on and would not do off
Are you refering to the check engine light? Is so the the car may need to go in for service or to pin point the exact problem via code reader.
GO 2 HARBOR FREIGHT BUY 1 OF THERE low cost de-coder it will give u a code that will tell why the light is on very easy 2 use over & over and u can help ur friends but first check 2 make sure gas cap is tight
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