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When you have an Oxygen Sensor that is faulty, this will not produce any noticable engine performance issues for quite some time. Over time, this "can" lead to premature failure of other parts/sensors in other systems, as the input from the oxygen sensor is used by the on-board computer to calculate correct fuel and air ratios. So this means you very well may see a decrease in fuel economy. So, as of right now- no harm being done. But, it may be something to have addressed sometime in the future, seeing as it's not all that expensive of a repair. The sensor sells for around $61 and the Labor Time Guide calls for under an hour to replace any one of them (there are 4 on this vehicle). If my answer has helped you, please help me by leaving a rating or accepting my answer so I may be credited. Rating or accepting my answer does not cost you extra. It allows me to be credited for my work. Please rate or accept. You can ask follow-up questions after you rate or accept.
Hi! I noticed this thread was still open and wanted to check in with you. Were there any other questions you had on this issue?