Therefore it is a terrible practice just to guess which parts could cause the check engine light and start to replace parts. You must understand that every time your check engine light is constantly lightened up or blinking, it will store a trouble code in the memory so you will have a chance to see what was causing the problem. So now, when we know what could cause this, where should we begin to pinpoint the problem? RELATED: Will the Check Engine Light Reset Itself? How to Diagnose a flashing check engine light? However, it is not as simple as that because many different things can cause misfires. Faulty engine sensors (coolant, air temperature, exhaust temperature sensor, etc.)Ī flashing or blinking check engine light is most often caused by misfires.Misfires on one or several cylinders (most common).Causes of a Flashing or Blinking Check Engine Light This is to notify you that a problem that may damage the catalytic converter is happening right now. If this problem is severe from a misfire, it will start to flash the check engine light instead. If the engine control unit is getting the wrong value from the sensor several times, the check engine light will appear on your dashboard. If one of the values from a sensor is faulty for a short amount of time, it will trigger a trouble code. The engine control unit monitors all sensors in your car while you are driving and with this information, it calculates how much fuel should be injected into the engine and at which angle it should fire the ignition. Let a mechanic take a look as soon as possible! The more you drive with a blinking check engine light, the more damage you can cause to your engine. Can bad spark plugs cause the check engine light to blink? What Does A Flashing Check Engine Light Mean?Ī flashing check engine light indicates that your engine is misfiring and there may be a severe issue with your engine.

And then there was light 2017