503 code on dodge dakota

Question

Truck has a high rev in gear as if the choke is open.runs hotter and louder ,then hits third gear then it drops down until it shifts lower and then when you come to stop it wants to stall out......

Answer 1

P0503 Vehicle speed sensor intermittent

This code condition does not match the condition that the engine has, Having a higher idle than normal , then when you come to stop wants to stall the engine out, This is the idle speed control being faulty,