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2004 Cadillac Seville SLS Question: I did not pass emissions because the check engine light wont come on. What to do
Answer #1G. T. Service Center (4228 Answers) , Stephenville, TX - (254) 638-3236ProfessorG January 03, 2014, 21:19Master
Do you have a way to erase the code if it comes on? If so create a code to see if it works, for instance unplug the MAF sensor and start the car. If the light comes on then it works. If not, it needs to be diagnosed to see if the bulb or circuit to it is bad. Make sure you plug the MAF back in.