I have a current code 0524, diagnosis of tumble flap 'intake manifold' : short or open circuit / actuating lever/ sensor faulty, replace sensor. Would that cause the engine to sputter under load at low rpm (1500-2000) in 4 or higher gear?

 

Yes, that could be a result. Basically the air is flowing through a different runner path then it was designed to have at that RPM.

 

So what is fix for the component or just replace entire manifold