Car driving fine. There have been several diagnositic codes noted. I heard the O2 Sensor ?#2 needed replacing. I was also told at HONDA I needed 2 heat sheilds relaced - they were rusting on the edges. I have been told that is not necc.?? Parts cost? Reality? Heat shield issue? Been Told up to 750 or 800 at Honda. As low as 300 for parts and labor at other place. Help truth. I was also told I would notice a change in the car feel, sound and gas mileage when it really needed to be done. Funny, I went over a curb and banged up 2 tires and a control arm in a freak seconds occurance and they clamped up what sounded like a heat shield. In the meantime - light went off for several days until a long distance drive.