2004 f150 lariat help
 

I have a 2004 lariat 5.4 and after driving it for a hour or so it and only when I stop the rpm drops down to 400-500 and starts making wierd noises and wants to stall as soon as I get on the gas its fine, I have edge programmer and it comes up with the code po345 camshaft position sensor A circuit (bank 2) also today battery light came on and dash had on it to check charging system my edge gave me code po622 generator field terminal circuit ,I need help on what both these codes are and were to start .I have changed the spark plugs and the oil in the last 500 klms with ford parts. thanks

Place the two codes (one at a time) in the Google search box. You'll get plenty of sites they will point to with possible causes and items to check.