04 Bonneville. Check Engine Light has been on for 6 months or so now. Is there any way to troubleshoot other than taking it to a dealership? I live in VA and understand it can fail inspection if not fixed. I do not totally trust the light because the instrument cluster seems to be a minor issue, mostly the gas gauge not working properly. I have also had a starting issue both when hot and cold out where I have had to give it a little accelerator to get her running. Other than that, true love!!!