I have a pioneer 2050 mpg it keeps coming up error

It is possible that you player has got in a bad cd that had got entagled inside the mechanism orr doena damage into the system. If you are able to retrieve the cd fron the front without damaging the set please do it carefully other wise open the set's cover and carefully unwind the mechanism motor drive to retrieve. After this if a another cd goes in well and tracks your are lucky other wise, check if the cd drive is sppining well and the tracks are read if not clean the optical and try. if the cd goes in fine, spins and does not read then it could be a possible failure of the optical head. If not the loading mechansim should be checked for loading errors. check the motor drives for slippages or dirt. clean and try.check voltage onthe motor to confirm if motor has failed. Hopt this helps. Good day