Okay.. so I was studying the wiring schematic for my car and I noticed that the O2 sensor is connected to the ECU by two wires....one that is a white wire, and the other a blue/yellow wire...

My question is: which wire do I need to tap into in order to get the proper readings for the gauge... or am I even reading it right!?

People who have the air/fuel ratio gauge installed..please HELP! thanks!