Check with your manufacturer, owner’s manual, our site, or various online resources to learn more about trouble codes. These codes will identify the root of the problem. To figure out if the engine control unit is truly having problems, you need to search for the specific trouble codes on your vehicle’s computer. Sometimes the engine control unit will do this by mistake too. Of course, there are many possible reasons for why this warning light would illuminate.īut in cases where the engine control unit detects issues with its electronic components, circuits, and/or sensors, it will immediately cause the Check Engine warning light to illuminate. The easiest symptom to recognize is when the “Check Engine” warning light illuminates on the dashboard. Fortunately, there are certain symptoms that you can look out for early on to detect if your engine control unit is going bad.
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