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Check Engine Light Flashing vs. Solid - What is the Difference?

September 30, 2023

Your check engine light comes on in the middle of a commute -panic sets in. Is it a minor glitch or a major catastrophe? Few things are as enigmatic as the check engine light. 


Today, we embark on a journey to unravel this simple but concerning symbol - more specifically, the difference between a solid and flashing check engine light!


The Constant Guardian: The Solid Check Engine Light


Imagine your car's solid check engine light as a supervisor, always on the lookout for irregularities in your vehicle's performance. When it illuminates, it's the way for your car to say, "Hey, something isn't quite right here."


What Does It Mean, Exactly?


A solid check engine light often indicates a problem that, while important, may not be an emergency. It could be something as simple as a loose gas cap or a faulty sensor. However, it's essential not to ignore it, as even seemingly minor issues can escalate if left unaddressed.


Diagnostic Mode


When the light is solid, it means your car's onboard computer has detected a fault code. To pinpoint the issue, a diagnostic tool is needed to read the code and determine the problem's nature. It's a crucial step in the repair process.


Flashing Check Engine Light - Immediate Action Needed


Now, let's talk about the flashing check engine light – it's like the car's equivalent of a siren. When it starts flashing, your vehicle is trying to get your immediate attention. But what could deserve such urgency?


Serious Misfire


A flashing check engine light typically signifies a severe problem, often related to the engine's performance. It could be a misfire, where one or more cylinders aren't firing correctly. This can lead to significant engine damage if not addressed promptly.


Catalytic Converter Damage


Continuous flashing could indicate a misfire that's dumping unburned fuel into the exhaust system. This can overheat and damage the catalytic converter, a costly repair.


Cooling System Failure


While the check engine light can be solid when something is wrong with your cooling system, when it starts to flash, serious consequences might be around the corner. If the temperature of your engine is not regulated, it can start to friction weld components, combust fuel, and many other problems.


What To Do When The Check Engine Light Starts Flashing


If your check engine light starts flashing, it's essential to pull over to a safe location and turn off your engine immediately. Continuing to drive with a flashing light can exacerbate the issue and lead to more extensive damage.

                          

When in doubt or in need of help, contact Shawnee Station Automotive, and we will get that pesky check engine light off of your dashboard! You can also take a look at all of our other services and specials. 


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