What is the most common problem for dct code p0734 on Nissan quest

Question

What's a common problem when the dct code p0734

Answer 1

4th gear shift solenoid is not working correct either stuck open or closed 

have you replaced the transmission fluid? if no start there 

if replacing the fluid does not help you may to replace the solenoid or the whole valve body if the transmission is slamming gears and grinding and there are metal flakes or piece the transmission fluid and pan you will have a bad transmission and needs to be replaced.

the transmission pan will have to be removed to get to the solenoid in the valve body 

The valve body is inside the transmission