Pontiac Grand Am MIL

” I just changed the battery out on my Pontiac Grand Am with the supercharged 6 engine. Now I can’t get my car inspected, they tell me too many MIL lights are not ready. They said to drive the car to reset it, but I’ve already gone over a hundred miles and it still won’t pass.”

Well, if yours is an earlier model supercharged Grand Am (say a 96-98), then they did have a lot of problems going through the drive cycle and resetting the MILs on those cars. I’ve seen it take 250 miles sometimes to reset them. And realize you MUST drive a while on the highway at 55 mph (use your cruise control, it helps the computer go through the drive cycle faster) in order for it to fully reset itself. Realize that you can have up to 2 MIL not readys in the computer and still pass the emissions test (but 3 mils would make you fail.) So take a good road trip and hopefully it will reset itself. In the unlikely circumstance it won’t reset itself, but still shows no trouble codes, you may have a computer problem that may cause the ECM to need replacing. But try a good long drive on the highway first.