I have a 7th civic, not a 6th gen. I don’t have any bleeder screw as you mentioned. There are two sensors,1 at the upper radiator hose by the EGR valve and the other down below, no bleeder screw.That is not how it works.
There is no "code" for lack of coolant, or "pcv air leakage" in relation to coolant level. The PCV system doesnt give two flying fucks about coolant, considering it has nothing to do with coolant, period.
So I dont know how you know that is related.
"i dont be having enough time" Then dont work on the vehicle. Pay a shop if you cannot afford 5 minutes of your time.
Use the damn coolant bleeder that is right near where the upper rad hose goes. Literallly designed to bleed air out of the system.
Get the engine warmed up, crack it open, hit the throttle a few times, tighten down, let engine cool, top off with coolant, job done.
If you have trouble bleeding it, remove the thermostat, remove the brass air valve with pliers, make sure the hole is located to 12 o'clock, re-install, repeat bleeding process.
I have this issue before where I would get the same codes and took it to the dealership and they told me it’s the pcv valve need to be changed when I already changed it less than a week before I took it in to them. Took it to another shop and they can’t find any issues. So what are you talking about.
Every time I have to drain the coolant from this car that’s what happen when I put it back together. There are no vacuum leaks whatsoever, the pcv valve hose doesn’t have cracks, clams are on there tight enough. I remember late last year I was working on it and drained the coolant and got the same code, after bleeding the system the code went off and came back and I bleed it again and it went off again so if the code don’t have anything to do with air in the cooling system and pcv valve change twice, aftermarket and $20 dealership pcv valve and no vacuum leaks, then what it is?
and I didn’t state that there is code for low coolant either.