How to fix it so i can pass emissions?
I took my folks van to the vehicle emissions testing place twice and I failed both times. I even went to two separate testing places. Both times they plugged in to the OBD and they said it was working but not reading. I changed fuse 17 and a few other ones that were not blown. I took it to a mechanic and his tester could not read the vehicle. I have no idiot lights on. I really want fix it myself.