03 Escape 3.0. No power, received codes for both manifold o2 sensors running both rich and lean. I have tested the MAF sensor and found that there are no grounds, but does have power.

Anyone have experience clearing up the grounding issues?

 

To confirm the ground is the only problem, the black with white tracer wire is the ground wire. You can run a jumper wire from the battery negative terminal to the terminal point where the black& white wire plug to the MAF sensor. This will provide a ground if that ground is incomplete. If everything is OK then trace the wire to where it is connected to a ground connection. Check that connection it could be off, missing or open. If that is ok then there may be a break in the black& white wire.