Service Engine Light Came On. If your mitsubishi check engine light stays on, first check that the gas cap is on tight. I was merging on to the freeway when it winked on.
If it doesn't do this, repeat the process. He informed me that my thermostat was not keeping the engine at the desired temperature. My check engine light came on out of the blue one day (12/14) i had my mechanic look at it immediately (the same day).
If the ‘service engine soon’ light comes on, it means that there is a minor problem with the electronics or the engine of your car.
Identifying the service light is a lot easier than most of the other symbols you might see next to your instrument cluster. The service engine light is the same as a check engine light and means that there is something (not always really bad) is going on with your motor and need someone that has a code reader to let you know what the code is. There may be a major problem with the engine or one of its components, but it's usually a minor issue. Follow these steps to troubleshoot your check engine light (cel), also known as the service engine soon light.