Could be a multitude of things. Does it stall when you are giving it gas? If it stalls only at idle and has trouble starting it may be the fuel pump. If you want the cheaper way out buy some premium gas and clean the spark plugs to see if that makes a difference and rule out the fuel pump if it is significantly better. It could also be the fuel injectors.
if you indicating computer 'gives no codes' because the computer is broke, then this is your worst nightmare...new computer; but definitely try suggestion above 1st.
take it to a mechanic?
is the computer setting a code or check engine light, if not it could be your crank sensor.
check your vacuum hoses, they could be loose or they could have a leak
Having trouble with it stalls?
I'm no expert, but it could be a battery or alternator related problem.
Needs a new clutch
Whenever any vehicle stalls while driving it should be seen by a mechanic soon. It can be the a issues with the computer, ignition, or fuel.
Start the car and while it is running, disconnect the positive cable from the battery. If the car stalls, the alternator is bad.
It isn't your transmission that's stalling. It is your engine that stalls. The on-board computer is supposed to incease the engine Idle to prevent this. It will require more troubleshooting to find the part(s) that is(are) the culprit. Start by scanning the ECM for trouble codes and go from there.
My 2000 Sonoma did the same thing. When the computer was plugged into it it showed no problems. Finally after several stalls the computer finally showed the accelerator position module was bad. I replaced that and no more in traffic stalls.
If the engine stalls and won't restart for several hours on a 2003 Santa Fe, there is a problem with the computer in the vehicle. Check to make sure all computer fuses are working properly.
There are quite a few problems that could cause what you describe. Use an OBD2 code scanner on your vehicle to figure out what's wrong. The computer will give you a pretty good idea of where to start looking.