tend to agree. In Michigan, there are no laws requiring owners to pass an emissions test. There use to be in the 80s but they were dissolved in the late 80s.

tend to agree. In Michigan, there are no laws requiring owners to pass an emissions test. There use to be in the 80s but they were dissolved in the late 80s. I believe states like California still have them and I know, at least, Illinois has them. In Illinois, it's a simple matter of a test center pulling data from the ODB2 port.