+18 What Does The Check Engine Light Symbol Look Like References. The check engine light is a signal that the onboard diagnostics. A dashboard warning light can often be one of the first signs of a problem with your vehicle.
It also can be a picture of an engine, or have words, such as “check engine,” “ service engine soon ,” or “check powertrain.” Web danny adams, aug 15 2018. The engine control unit or ecu is the unit that monitors the components of the car to detect any problems.
