Not to be a jerk here but you're wasting your time and money to do ANYTHING before you get the code scanned, especially disconnecting the battery. That's literally the equivalent of watching a virus delete files and blue screen your PC and then rebooting to see if it magically goes away. Scanning is free at AutoZone or Advance and you can buy your own scanner on the cheap from a number of sources. So what the heck is the delay?