First of all, thank you for the possibility of being here in the forum.
Second of all, I'm ahead sorry for my bad english as Im from brazil and english is my second language, so a few mistakes will be made.

I have a 2000 Civic EX 4 door, it has 142k kilometers on it.

I bought the hondash obd2 for it, and I have the following errors:
DTC 9 - CYP (cillinder position sensor)
DTC 23 - KS (knock sensor)
DTC 62 - Fail code on the primarty oxigen sensor (not confirmed)
short term fuel adjustment (O2FT-ST) > -29,7 (out of range <-29,0|30,0>)

My simptons are:
VTEC doesnt toggle on
check engine light
When its really sunny outside, and the temperature is high, the car acts extremely weird - It fails on low RPM and when stopped at a red signal sometimes the RPM keeps dancing between 750~1100.
At night the car doesnt fail on low RPM, only when its sunny. (It may fail sometimes but its really rare).

Im attaching a print of my hondash, in case it helps on something.

I dont think ill find the solution of my problems, but I need a north on where to look.

Thank bros.