I just had my check engine light inspected and it was for this same error code (P0130). I'm taking my car to the dealer next week for the reprogramming. I'll be paying close attention to my MPG after the work is done to see if it does impact anything like the poster before me metnioned.
Car not fixed yet, going to dealer tomorrow.
Since car is at 45K+ miles, I wanted to see if it was something I could fix. Went to AutoZone to have code read, P0130 (O2 sensor Bank 1 Sensor 1).
After they read it, and I was ready to leave, the check engine light was off. I asked the tech if he cleared the code and was told "we're not allowed to do that sir."
Sensor (Part # 17475) is about $105 and special order from AutoZone, and their supplier doesn't stock one, SOOOO.... I'll let the dealer handle it since it SHOULD BE an Emissions Warranty Issue.
Well it is fixed on Warranty because there was a TSB. Now car drives different and fuel economy seems lower (Can't get over 40 mpg if foot on pedal at all.) Dealer says it has to learn all over again and to give it a month. They better not have made its' mpg like a regular fusion. Why buy a hybrid if it can't get 40+. I have learned how to drive my car and was getting 600+ regularly on a tank (39-42 avg for whole tank; for last 5K miles or so). I new it was too good in that the car was finally getting good mileage.