I have replaced the co2 sensor the ignition coil, the exhaust manifold and the gasket for it this week. The light was off for a day and today back on again. I am at a loss, mentally and now financially. Any idea, experience as to what I could be chasing? The light is on solid and not blinking. Help please, if you could. I am a woman and need to sound like I may know what I am talking about next time I get this looked at. Thanks!!!