A check engine light flashing on your dashboard is one warning light you can’t ignore, and that can’t wait until the weekend. For new drivers around Carthage, and the parents who taught them, knowing what that blink means can head off a costly repair.
What Does a Flashing Check Engine Light Mean?
So, what does a flashing check engine light mean? According to the Environmental Protection Agency, it signals a severe engine misfire, meaning one or more cylinders isn’t burning fuel properly. You may also feel the car shake, idle roughly, or hesitate when you press the gas.
Is a Flashing Check Engine Light Worse Than a Solid One?
Yes. A solid check engine light means the car’s computer found a problem that could cause excess pollution. Missouri’s Gateway Vehicle Inspection Program says a technician should test the vehicle if the light stays on after many driving trips. A flashing light is far more urgent: The same program says to have the vehicle serviced immediately, and the EPA calls a blinking light a serious engine problem that should be fixed quickly.
What Should You Do When Your Check Engine Light Is Flashing?
If you’ve ever typed “What to do when check engine light comes on” into a search bar, the answer changes when you start searching for “What to do when the check engine light starts flashing.” The EPA advises reducing speed and minimizing driving. From there:
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Ease off the gas and avoid hard acceleration.
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Pull over safely at the next exit or parking lot.
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Turn off the engine.
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Call a tow if the shaking or flashing continues.
Parents, make sure your teen knows a flashing light means stop, not “Get home first.”
Can a Flashing Check Engine Light Damage Your Catalytic Converter?
Yes, and that’s the main reason to stop driving with your check engine light flashing. During a misfire, unburned fuel reaches the exhaust, where the catalytic converter cleans harmful gases. The EPA warns that even a short burst of severe misfire can badly damage the converter, and Missouri’s Gateway program calls it the vehicle's most expensive emissions-control part. AAA puts the catalytic converter replacement cost at $1,000 to $4,000. According to Universal Technical Institute, worn spark plugs or ignition coils often cause engine misfires.
What Happens During a Check Engine Light Diagnostic?
Finding that root cause starts with your car’s computer. Every car and light truck sold in the U.S. since 1996 has an OBD-II port, usually under the driver's-side dashboard. During a check engine light diagnostic, a technician plugs a scanner into that port to read trouble codes, such as P0300 for a random misfire. Still, UTI notes that reading the code is only the start. The technician then tests spark plugs, ignition coils, and fuel injectors to confirm the cause before replacing parts.
Don’t keep driving with your check engine light flashing. Pull over, call for a tow, and bring your vehicle to Fast Monkey Auto at 2302 Fairlawn Ave. in Carthage, Missouri. Our technicians run a full check engine light diagnostic, find the cause of the misfire, and text you clear updates along the way. We also offer secure after-hours drop-off. Call 417-323-0441 today because we’ve got your back.