Strange issue

[Doomer4567]

So currently my ranger a 3.0 v6 manual is showing three codes, two of them are both my engine banks are running lean and the third is saying my o2 sensor bank 1 sensor 2 is is out. I already replaced the o2 sensor and it came back.

Now here's where it gets confusing. I did a live test and it says all three of my o2 sensors have no voltage, as far as I know i have no evap leaks and we replaces my MAF sensor recently. Also my compressor is failing but I just think its going bad

My theory is either one of my 02 sensors is shorting and causing issues or my pcm or a similar control module is failing. I wanted to get people's opinions as i cant just throw money at parts until it gets fixed. Thank you for any help!

Edit: I couldnt pull codes at the time but the codes are PO171, PO174, and PO141

 

[2011Supercab]

We're going to need the actual code numbers, otherwise we are going to have to take guess's

 

[xeris]

Check if the O2 sensors have reference voltage to them.

 

[Doomer4567]

Check if the O2 sensors have reference voltage to them.

I believe it's around .1 to .9 but the test says 0.0000V