ok here is what I did.. my check engine light was staying on because of no active muffler control. I opened ecm spy and in the diagostics tab I turned active muffler control to "off", then I cleared the trouble code and after that I hit "burn". my question is, should I have burned ?
check engine light is off so it seems to have worked
2007 xb12s lightning
after market muffler
check engine light is off so it seems to have worked
2007 xb12s lightning
after market muffler