Just got bunch of codes all at once!!!

[alia176]

Not sure what's going on but there has to be a good reason why I got a crap ton of Dx codes all at once. Car seems to be running well but obviously something is amiss here.

Code 14 #1 Injector
Code 23 Air Flow Sensor
Code 32 O2 Sensor 1 (Right)
Code 35 EGR solenoid valve
Code 37 O2 sensor 2 (left)

Almost sounds like a harness that's making intermittent contact. It's not possible for all of these items to fail at once So, let me see if the dang mice/rats chewed up anything. I did clean up a rat nests all over the engine couple of days ago so they might have gnawed on a wire here or there Freaking things are the bane of my existence.