So I know these codes have been discussed here before. I have a 2009 chevy cobalt and have been dealing with this problem for some time. However, the check engine light will go off from time to time. But, I have to take my car to the emissions soon. So even with the check engine light off, the codes still pop up on my OBD reader. I read that my vehicle will fail if an emissions related code pops up. So, if I take my vehicle to the emissions test with the check engine light off, will my vehicle fail if the OBD reader shows PO700 and PO976? I am in Illinois.