What is what does it mean when the check engine light is flashing?

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A flashing check engine light is a serious warning sign that should not be ignored. It indicates a severe problem that could potentially damage your engine. Unlike a solid check engine light, which often signifies a less urgent issue, a flashing light usually means there is a misfire occurring in one or more of your engine's cylinders.

Here's what a flashing check engine light typically means:

• Severe Engine Misfire: The most common cause is a misfire. This happens when one or more of your engine's cylinders isn't firing properly. Unburnt fuel is then dumped into the exhaust system.

• Catalytic Converter Damage: The unburnt fuel from a misfire can quickly overheat and damage the catalytic converter, a crucial component in your exhaust system that reduces harmful emissions. Replacing a catalytic converter is often expensive.

• Potential for Serious Engine Damage: Continuing to drive with a flashing check engine light and a misfire can lead to significant engine damage, including damage to pistons, valves, and cylinder walls.

What to do:

• Stop Driving (If Safe): If the light starts flashing while you're driving, safely pull over to the side of the road as soon as possible.
• Do Not Ignore: A flashing check engine light requires immediate attention.
• Get It Diagnosed: Have your vehicle towed to a qualified mechanic to diagnose and repair the problem. They can use a diagnostic scanner to read the error codes and pinpoint the cause of the misfire or other issue.
• Avoid Driving Until Repaired: Avoid driving the vehicle until the problem is fixed to prevent further damage.

Ignoring a flashing check engine light can result in costly repairs down the road.