Help Fast Please, No ignition Power

[Maj]

Connectors on the alternator circuit too, haven't heard of many probs lately but they were a common thing,
most likely up at the regulator , but check at the end of the alternator wires too , usual fix if there the prob is to fit new terminals and plug, readily available at an auto elec.
fault code is probably from things complaining with not enough voltage, will loose the codes anyway as soon as you key off