Cool Hyundai Check Engine Light Blinking 2023. Regardless of what happened with the oil, a flashing check engine light (cel) almost always means there is a problem with a cylinder firing (spark is not igniting the fuel). The red light on the remote will blink, the hazard lights will flash, and the engine will start up.
You should stop driving it and have the code checked. Below are the causes of the hyundai sonata’s check engine light flashing: Engine is misfiring on one cylinder with an engine misfire, the combustion reaction doesn’t complete normally.
