2000 Hyundai Elantra OBD2 code P0750 Shift Solenoid A malfu

I just bought the car 3 days ago. Bought it Friday and the light came on Saturday after I drove it only 40 miles. Don't know what kind of upkeep it had. Unfortunately, I bought it "as is", so I'm stuck making the repairs. I don't know if it's ok to drive it until it's fixed, since I drive 80 miles daily for work. I'm more worried about the shift solenoid a and if it will ruin the transmission if it's not fixed. There are only 75,500 miles on the car. I will try to replace the gas cap and see if that helps the P0441 code. Seems that's the easiest fix for now. If that doesn't work, maybe we'll have to replace to purge valve.

No, I didn't buy it through a dealer. It was a used car lot. They have agreed to fix the P0441 problem, even though they didn't want to at first. When they put code reader on it, the only code that came up was the P0441, not the P0750. We do have a friend with a transmission shop who told us to let him know if the check engine light comes on again and let him know what the car was doing when it came on, ie: rough shifting, slipping, and he would be able to tell us more. Said it wasn't too big a deal, so I'm feeling better about that. Is it posisible that when my husband used the obd2 at the parts store, that P0750 code was for someone else's car, and it wasn't cleared before he used it? I don't know how they work, so don't know if that could happen.