Vacuum leaks and 02 sensors

[Jeff98ohv]

Geting roughly 9-11 mpg, getting 0volts to 02 sensors, not sure why, they are plugged in, suggestions on that ?
Also I think I have a vacuum leak. My obd scanner is showing I'm at -11 in/hg, I thought it should be at 25 idling , 15-20 while driving ? Truck runs good , I just replaced iac, but still needs some more work.. really need them 02 sensors online ..

 

[974X4BLACKSPORT]

My Actron code reader (CP9575) shows the exact same thing on the o2 sensors, big fat ZERO on all of them, and 18% TPS at closed throttle, all fuel trims show -100% However the truck runs great.

 

[Jeff98ohv]

Exactly the same lol -100% on my trim, I'm sure if i could get them back online my mpg would go up to normal

 

[German Engineer]

Did you try this?
2nd gen issues? Try this first!

 

[Jeff98ohv]

I will most definately try that, just reading that post , alot of people seem to have had that exact problem!