We know all too well that sinking feeling in your stomach that you get when your vehicle’s engine light come on. Don’t panic just yet, but also importantly, don’t continue driving your car without having the issue diagnosed! The engine light (in some cars EPC Light) is a signal from the vehicles on board computer that something is wrong. Depending on the severity of the problem the light might be intermittent or stay on constantly. The light usually stays on once a fault has been detected and might stay on to remind you that a problem occurred.