1993 nissan sentra will move when you put it in gear but want go when you acelerate

Is it a automatic or manual transmission Alex?

Go to Auto Parts Store and purchase TPS Sensor.
Only if you know that is your vehicles problem.
Codes alone, don't always tell you what is wrong, and what to replace.
Most people are starting to believe it's that simple.

it should mount on the front of the trans mission rite above the gear shift on the trans

have you tried changing your rotor and distributor cap? and checked the wires for breakage or leakage?

how do u know its 2nd gear, has the cable snapped that controls the gear change.
if not try tensioning it, if no joy another transmission

If second gear stuck it need rebuilt ore replaced.
check what labor to rip one out replace a junk yard one ore check see what cost rebuilt it.
stay away form amco there rip off artist.
Your cost about 900 to 1000/.
if you do your self 600 for junk yard one and few hundread if you can get rebuild kit rebuild the trasmission your self.
I took trans rebuilt i rather buy used ore pay some rebuild it.
Give thumbs up if that help seya

check the transmission selector rod, it just happened to my car last week. i could do reverse when i found out it broke. one thing that might caused it is too much pressure applied on the stick shift.

try puting shifter in nuetral , common nissan problem

is it a manual or automatic?if it's manual check clutch.if it is automatic check transmission fluid.

Sorry to say sir but running out of fluid/ transmission oil will definitely fry your tranny.