What I have: 1991 Sable 3.8L
It's not the sensor itself, as I substituted a known good one; code 176 continues to show up in continuous memory.
I tested the ground wire; there is continuity to ground. The sensor connector pins look good.
My desire now is to test the continuity of the "hot" wire that runs between the sensor and the ECM. However, I do not have a schematic for that: can anyone help me identify the corresponding ECM connecter pin?
Am I on the right track... is there anything else I should check?
P.S. My fuel economy is horrible. I'm assuming the computer is dumping loads of fuel in an attempt to correct a perceived lean condition.