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Engine Code P0440...HELP

J

JakeH0605

New member
Just purchased a 2005 Grand Prix yesterday and at the dealership a Engine Code P0440 came up. The gas cap tightened and the mechanic added some grease to the seal to solve the problem and cleared the code. When I filled the tank today the Engine Light came back on, assuming it is the same code. What is recommended to solve this problem and do I need to worry?
 


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