2005 Toyota Avalon

2005 Toyota Avalon Two Wheel Drive Automatic

I would just like to know I have been a car builder and back yard wrencher older cars mostly but these new cars have me a bit confused on the code readings is there a site or software I could get to simplify the codes that I recieve like (fuel shut off controll open)does this mean that its bad just would like to know the full meaning of this or more of and explanation I have found out a few of these for my self I guess some of these fault codes are a bit confussing ijust got a scanner hand held modle