I just got my used 2006 wrx and it has been sitting in my parents driveway until I graduated from college. My father has been driving it around every so often and I drive it when ever I am home.
The mistake we have made is we have been putting in a lower octane than we should have for about 2000 miles. The check engine light is now on and the code read a bad o2 sensor. I now know to put in the premium grade fuel (I live in New Jersey and we don't pump our own gas, so I just saw that giant sticker near the gas tank) but I was wondering if I should be replacing my o2 sensor or just continue to put in the correct fuel and the o2 sensor will be fine. Is there anything else I should be checking for because of my little mix up?
Thanks for any help