Pioneer AVH-P5900DVD not reading CD or DVD

Hello, my Pioneer AVH-P5900DVD is not allowing me to play any CD or DVD and has given me an error code, error-02-9e yesterday. I have tried checking up for any solutions in the internet but did not find any. What seems to be the problem with it and how do I fix it? It will be very helpful for me if you can give me any suggestions and/or solutions regarding this topic. Thanks.
