Son let his car run out of gas, and when he filled it this code appeared with rough idle and stalling code 2002

When the tank is driven to low it will pick up particles from bottom of tank. this is not good for a car wanting to run smooth. I would suggest some injector cleaners. you should be fine. Keep in mind the fuel filter if it doesnt help.

I had a something similar to this happen to a girlfriend of mine. She has a 98 escort and it ran out of gas and the service engine soon light came on after she filled it up. If this is what your talking about check your owners manual. Most of the time if there is really nothing wrong with car you can drive it around ( Generally 20 min in town and 10 on the hwy with 4 idle periods (4 times of the engine being at idle) - do not cut engine off) and the light will go off. The rough idle code most likely happened when the engine ran roughly because. it was running out of gas.