The check engine light coming on is the first signal that you need to take your car to an Auto Repair Shop for diagnostics. The light is an alert that something has triggered faulty in the on-board diagnostics system.
However, this could be anything from a loose gas cap to a major engine malfunction. The most common reasons you’ll need to bring your car in for a check engine light are engine or transmission issues, electronic power control failures, spark plugs, or dirty or clogged sensors.