toyota o2 sensor

[pat4x4yota]

my 83 toyota has an o2 sensor. it is carborated and i need to know why a carborated motor needs an o2 sensor.

[wrnchplr]

my 83 toyota has an o2 sensor. it is carborated and i need to know why a carborated motor needs an o2 sensor.

are you refering to the thing that looks like an o2 sensor and is in the cat?