The engine light is on, we had the van in for some repairs but they couldn't get the light to go out after?

Attach a scan tool to the data link connector and see what the problem is. It should also allow you to reset the computer and turn the light off. You might want to try disconnecting the negative. Battery terminal for 10 second and see if that works on your vehicle.

Don't just disconnect the negative I had the same problem with my car at first the o2 censors wor bad so we replaced them but it still had the light on so I dsassembled the whole batter for about 50-10 minutes and hooked it back up then I started the car up and the check engine light went off. Also the same thing happened to my uncles car but his problem was the fuel so he put in some fuel stabilizer about every 2-3 fill ups and hasn't had the problem since.