what causes q p0740 an a p1582 code to pop up on 2000 Volkswagen Jetta

i changed tranny fluid an filter both o2 sensors new cat new temp sensor new plugs an wires new mass air flow sensor cleaned throttle body all new hoses on entire motor

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1 answer
Here is a link to information on P0740 http://engine-codes.com/p0740_volkswagen.html
This link has an answer that makes the best sense for the code P1582