this sort of error message is consistent with the autofocus motor fault, the autofocus motor system, youd need to remove the bottom panel of the camera and clean the autofocus motor cogs and apply a little grease to lubricate them. that would be the fix had the camera not went for a casual swim in the lake. id recommend taking it to a camera specialist for a once over, this i'm afraid may cost more than the camera is worth to fix, there may likely be more than one fault here. good luck.