What does the oxygen sensor in a car do?

Related questions

1. Does oxygen sensor affect performance?
2. How often should you replace oxygen sensors?
3. What happens if you don't replace oxygen sensor?
4. Is an o2 sensor necessary?
5. Does replacing oxygen sensor improve gas mileage?
6. Is it necessary to replace oxygen sensor?
7. Can a car run without an o2 sensor?
8. Can a car run without a catalytic converter?
9. Is replacing oxygen sensor important?
10. Does oxygen sensor affect fuel consumption?

Tags

1. #levels
2. #engine
3. #manifold
4. #mixture
5. #unburned
6. #exits
7. #mounted
8. #computer
9. #tells
10. #burning
11. #monitor
12. #gauging
13. #monitoring
14. #sensor
15. #oxygen
16. #exhaust