I've been posting this all over the place, but haven't had a real definitive answer yet. My CEL keeps coming on. It comes on after the car has warmed up. I used my peake fault code reader and it is giving me a "0A" code, which is listed as Emissions (Lambda) Control. Anyone have an idea about this. The car is running fine, by the way. Its been suggested that this is related to the o2 sensor. Is there any way to test that theory?