Do I need to replace the ECM?

I have a 2014 Chevrolet Malibu LTZ 2.5L with 104k miles. I've been having issues with the car stalling out when the start/stop is ingaged. I couldn't figure out how to fix this problem but could still drive my car by driving it in manual to avoid the stalling out. Now the issue has gotten worse where if it does stall it has trouble even starting back up or the car just won't start at all. About a month ago I drove the car for about 30min, went into the store, went to leave and car wouldn't start. I had to rapidly pump the gas pedal and hurry and put in gear to get the car started and going. After doing so I got warning of "Engine Power reduced", "Service StabiliTrak" and i think one that said "Power save mode". The engine light was on and the traction control light was on. My car also wouldn't go over 40mph. I got it home and ran the codes. It gave codes: P0192,P055b,P055c,P0641,P2227,P2646,and P0113.
I cleaned the throttle body, replaced the spark plugs, changed the fuel rail pressure sensor. After doing this I cleared codes and test drove the car.I drove my car 2 miles up the road and when I turned around, had to stop to do so, the cars engine died and I had the same issues trying to get it started again. Nothing changed having same issues except less codes. Now it's only giving codes P0192, P055b, P055c and P0641. Not knowing what to do from here I took my car to a mechanics shop. They said I need my computer reprogrammed or if that didn't work I need to replace the computer.

Before this current issue with my Malibu, when I was only having mostly issues with the start/stop operating correctly, I replaced the MAF sensor, O2 sensor, VVT solenoids, both batteries, oil pressure sensor, air filter, alternator and regular oil changes!

P0192, P055b, P055c, and P0641 all refer to a loss of 5v ref, circuit 1 (of 4).
 
Verify that the 5v ref wires for the Fuel Rail Pressure sensor (ECM connector 2, pin 18, Brn/Red wire) and the Cylinder Head Oil Pressure (ECM connector 3, pin 5, Blu/Red wire) sensor are not shorted to ground, or open. If no short to ground or open wire is found, verify ALL powers and grounds to the ECM.

If everything checks out, but you have no 5 volt Ref at these sensors, it is likely that you have a failed ECM, which will require replacement.

You're going to need a good wiring schematic and what I would do is figure out what sensors are on that 5 volt ref circuit. Also if you have a full functions scan tool there should be database associated with the multiple 5 volt ref generators. If you can get it to fail you can go through and unplug One sensor at a time attempting to figure out where the short to ground is. Certain parts are more prone to failing than others. For example any part that deals with exhaust is more likely to have condensation build up and a failure. If the air pump diverter valve sensor and solenoid are on that 5 volt rough circuit that's probably the first thing I would unplug during my testing. Hopefully this helps