Ok I followed the advice of some h-t members and wrapped my secondary o2 in foil and tucked it under my dash. Is it still supposed to get really hot? And for the o2 sensor heater wires, does it matter which black wire goes to where?

 

What is an O2 sensor doing under your dash?

 

the o2 sensor is suppose to get hot, hence heated o2 sensor.

it doesn't matter which way the two black wires go, either way it works.

HTH
Brian

 

That is an affirmative. egtech is right.