have O2 sensor problems
Ok im new to the site and decided to make my first post. Anyways I have an 03 ext. cab ranger and just got it. When I got it the check engine light was on so I took it to autozone to see what my computer said was wrong. It turned out it was my O2 sensors, but it wouldnt tell me which one. I was told to go home and clean my mass air flow sensor. Then when I opened it I was suprised it was clean as could be. So what do I do? I really don't wanna buy two sensor, because I have one upstream from my cat and one down form it.