My check engine light came on the other day, and when I called Central Automotive about it, they answered my questions perfectly. They explained what the next step was, and where to go from there. They said that to get a quick diagnosis, I could stop by anytime. So the next day I did just that, and within 5 minutes they had someone at my car for a diagnostic, and about a minute after that told me what the problem was. They were friendly, professional, and incredibly helpful.