Originally Posted by brickloaf
would this also cause the obd 2 port not to power on?
someone told me that and i went in for inspection last night and failed both tests cause my obd port wouldtn power and my tail lights were to dark
That is correct, the OBDII port in the Cobalt is off the same fuse as the cigarette lighter, more specifically the one closest to the dash. I believe the tail lights are on a different circuit (IE: a different fuse), I could be wrong though, but I would check the fuses under the hood as well for your tail lights.