The message came.up on the des play screen. generator fault

once you start your car with the voltage coming from the battery to the starter and cranks your car and the engine starts running,this alternator/generator takes over and distributes power to every electrical part on your car and maintains the charge to the battery. so,you need to take your car SOON to have the charging system tested or you could/will be stranded somewhere if the alternator/generator/battery is/are bad(not working). depending if the alternator is bad,and depending on which style/amp is on your car,it will be anywhere from $219.00-$1052.10! if the battery is bad,then>$184.50 plus your old battery.>Battery - NAPA THE LEGEND - Premium AGM - OE Exact Fit..these prices are from NAPA AUTO PARTS.if you walk in and purchase yourself,depending on what is needed,BUT TESTING needs to be done first to determine!