[200_S_AWD]

Welcome to the forum. You are in Western NY? I'm over here in Rochester. So you already know about hard winters & road salt.
Cut or corroded wiring is the most common failure, followed by physical impact damage. Take a very close look at the harness. Look for any green powder. It only takes a pinhole.
Grasp & lightly pull on any lumpy or kinked-appearing wires, if it stretches, the wire is broken inside.
See Possible Causes. PCM failure is last on the list as it is rarely the problem & everything else has to be ruled out first:

 

[200_S_AWD]

Rule out the Possible Causes one-by-one. Does the fault set right away or after some time?
If it is right away (like during a self-test), it should be fairly obvious what is wrong. If it is an 'intermittent' problem, check the snap-shot or freeze-frame information stored when the fault code was set. This is what the PCM saw at the time of the failure. This may provide a way to duplicate the failure event so you can hunt it down.

U11E9 – What Does It Mean and How To Fix It - OBD2PROS

This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show

obd2pros.com