**Survey** https://www.surveymonkey.com/r/WellsTech
Your check engine light just came on, your car is running poorly, you’ve just hooked up a scan tool and got codes such as P0171 and P0174. Or your car just started and stalled with no check engine light! What do you do? Join us as we get in depth into fuel trims and how to use all of that information to your advantage when diagnosing for rich or lean concerns. We explore where fuel trims come from, the air/fuel ratio, and what happens when things aren’t working quite right. Don’t miss out on this introduction into fuel trims!

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