Check Engine Light Diagnosis

Hyundai Check Engine Light Diagnosis in Oak Lawn, IL

Did you just notice that your car’s check engine light came on? This means that your diagnostic system detected a performance problem. We offer a check engine light diagnosis at the Happy Hyundai service center guaranteed to get to the bottom of the problem. Beyond simply pulling trouble codes and handing you a report with the problem, we will help you navigate the issue to know what to do next by providing a professional recommendation to protect performance, reliability, and safety.

 Check Engine Light 101

Your Hyundai has an onboard diagnostic system with a series of computerized sensors constantly testing systems’ performances, including the engine, transmission, and exhaust to name a few of the most vital. When a sensor detects a problem, it signals the computer to illuminate a telltale dashboard warning to the driver as the check engine light. If your Hyundai’s check engine light comes on, we recommend scheduling a service at Happy Hyundai for a diagnosis.

 Why Drivers Should Never Ignore the Check Engine Light

The real issue when it comes to service is diagnosing the cause of the lit check engine light. Because the problem can range from a simple loose gas cap to a major fuel induction problem, some drivers can fall into wishful thinking that the problem can be put off until later. Maybe you have driven around with a lit check engine light before and it did not seem to be a problem. Rest assured that this is wishful thinking as minor problems can worsen quickly to cause big problems.


Because an illuminated check engine light signals a problem, it is plain old common sense to get it diagnosed and the problem fixed swiftly if you are interested in keeping your vehicle running at best.

 Common Causes of an Illuminated Check Engine Light

Although there are countless causes of a check engine light, some causes are more prominent than others. When we provide a check engine light diagnosis, we often find that one of these
components are to blame:

• Loose fuel cap
• Faulty catalytic converter
• Spark plugs, ignition coils, or spark plug wires
• Aftermarket alarm installed
• Vacuum leaks
• Recirculation valve defect
• Dying or dead battery