what else could be wrong on 1998 Mazda Protege

i have a 1998 mazda protege i seem the check engine light come on a few weeks ago i saw it needed power steering fluid i put some in and it went off. it just came back on the other day and i have checked all of my fluids and there good. i know my main transmission seal is leaking. what could be the problem'

No connection between the check engine light and p/s fluid. The light came on due to some other reason. You need to have the fault codes retrived to find out why its on.