Does downstream oxygen sensor affect gas mileage?

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Tags

1. #plugs
2. #catalyst
3. #should
4. #converter
5. #stalling
6. #after
7. #carbon
8. #fouled
9. #misfire
10. #either
11. #downstream
12. #sensor
13. #problems
14. #levels
15. #spark
16. #become
17. #exhaust
18. #placed
19. #oxygen
20. #hesitation
21. #monitor
22. #cause
23. #engine
24. #behind
25. #starting
26. #unless
27. #affect
28. #reacted