I installed an Alpine nav unit last night. It worked last night no problem. Got me to work fine. When I started the car to go home from work today, it had trouble starting... and gave me a "Check charging system" message. I turned the car off, and started it again, started up quicker. Now I have a "Check Emissions System" message. Turned it off again. This time it started up no problem. Still have emissions message. Off and on again, starts good, but still getting emissions message. Any thoughts on this?