2015 Buick Encore catalytic converter / Check Engine light

When replacing the catalytic converter the first thing you need to do is check the emissions decal under the hood. If your Buick has California Emissions a Federal Emissions converter will not work! Even if the vehicle was not originally delivered to California it may still have California Emissions. My 2000 Grand Prix was originally delivered to New Jersey and has California Emissions, my 2003 S10 Pick Up was originally delivered to Delaware and has California Emissions, but my 2008 Grand Marquis, also originally delivered to New Jersey, has Federal Emissions. If your emissions decal says "C.A.R.B. compliant" or "Conforms to California Emissions Standards" you have California Emissions. If the decal says "EPA compliant" or "Conforms to Federal Emissions Standards" you do not have California Emissions. If the shop sold you the wrong converter, they need to make it right. Hope that helps! Jim