Car: 2004 Honda Civic EX (Auto)
Okay guys, I need help. I'm getting confused with my car. I was driving home and cranked it up to 4,000 - 4,500 and the CEL started flashing. I got home it was not flashing anymore. It became a solid CEL and it disappeared about after a day or two of driving. What the hell do I need change with my car? I know that my O2 Sensor is bad, could that have caused a misfire?
Thanks for the help in advance.

*Performance is normal.

 

if you know your o2 sensor is bad then you should go ahead and change it. i would check the oil level also