My check engine light came on in my 2003 honda accord LX and I took it to AutoZone and they hooked the code reader up to it and gave me a code and I bought the part and replaced it and the light won't turn off! I put hundreds of miles on it but it won't turn off! How do you turn it off to reset it? Any ideas that I can do?

Take it back to autozone and have then reset the code, this will turn the light off for you. If the light comes back on, then you may have more problems. Also, with some cars, fixing one problem may trigger another problem to show up and it could read a different code. So have them check it out and if it is the same problem that you had fixed, just ask them to clear the code and wait and see what happens.