if it has a constant medium then it will compensate the fuel/air mixture as needed. it will work. people do it all the time!
find out what the resistance is, go to radioshack and get the proper resistor, wire it in so its not obvious and BAM you've got it taken care of. Voltage doesnt need to be varying to keep the light off. One is pre and the other is post, just measures the before and after 02 corresponding to the CAT. then you will have a constant ratio.
