I looked the code up, looks like it has something to do with a 2nd gear malfunction. For a few weeks I noticed somethings as I slowed down to a read light the truck would rumble and all mus stall out (sometimes doing) so, and sometimes I was was stopped at the light the RPMs would shift up and down.
Again the code is P0732. Is this something simple I can fix myself, how can I get this light off which is the only reason I failed. Please help. I'm in a bind with money and don't want to get ripped off by a dealer.

This malfunction is detected when the A/T does not shift into
second gear position as instructed by the TCM. This is not
caused by electrical malfunction (circuits open or shorted) but
by mechanical malfunction such as control valve sticking,
improper solenoid valve operation, etc.

This malfunction will be caused when shift solenoid valve B is stuck
open.