ENGINE RUNNING TOO LEAN

I have an 05 ranger 700 that is melting all of the plastics in front of the motor. I did a search and found a few people that have heat problems but this seems much more severe. I just finished checking the plugs and they are bright white-looks too lean. I dont have any engine,exaust or intake mods-all stock. The wrench light is not on or flashing (only on with key on engine off). Is there a way to check for diag codes on an 05? Any input would be great. Also, if anyone knows of a link to a pdf service manual that would be fantastic.