The cool thing about cars these days is that they’re very computerized. There is a computer that monitors various sensors inside the car and uses those sensors to regulate things like idle speed, spark plugs, and fuel injectors, to name a few. If something goes wrong, the computer can sense it and will activate your vehicle’s Check Engine light to alert you to the fact that there is an issue. Since your vehicle is computerized (i.e. complicated), it can be tremendously difficult to fix something yourself if you don’t have the proper tools, knowledge, and diagnostic equipment. As much as it might cost to have a professional technician take a look at your car, you can rest assured that your vehicle will get serviced and/or repaired correctly.