Looks like fuel and air issues to me. I have a cheapo 15$ reader and I can watch the voltages on all the sensors. Had it for a while now and works pretty good. Plug it in and rev the engine a couple of times. You should see stuff voltages changing. The internet can explain each item if you search on it.
Software icon says "OBDwiz". Just plug the adapter from the car's OBDII port to my laptop USB. Helped me isolate my check engine on my Tacoma to the O2 sensor. Fixed on first part replaced.
Checked a code on my Z the other day. Cyl 4 misfire. Reset and it's been good. Think that one was a bad tank of gas.