No, the diagnostics won't, but the DTC Sticky will.
It did, but if you are low on refrigerant, it will reappear shortly after you start using the A/C again.(I guess clearing all codes on PCM cleared the low refrigerant code but it never "showed specifically that code).
Yes, that is what I was referring to.I assume you mean hooking up a set of gauges to check the operation of the system...which I see NO mention of in this thread as being done.