The EGR valve is faulty, or rather, the electrical system is malfunctioning.

EGR valve failure. has bene replaced 5 times by a shop. Electrical system and vacuum system check as good. they say no buildup in the passages. Last 2 were oem parts. He says the valves keep failing. Light comes back on within minutes or a couple days of being fixed

I am getting codes indicating faults in the four oxygen sensors, EGR, and EVAP system. I replaced all the wires and installed an engine computer, but the codes are still appearing.
Is there another reason that could cause these codes to appear together?