Can a misfire damage the catalytic converter?

Yes — unburned fuel from a misfire enters the cat and can overheat it, causing permanent damage.

How urgent is a coil replacement?

Fix within a week. A flashing check engine light means the cat is actively being damaged.

High Severity

Ignition System

Coil on cylinder 6 fault.

Common Fix

Replace ignition coil

Estimated Cost (DIY)

$20 - $80

Failed coillikely

Wiringpossible

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Can a misfire damage the catalytic converter?: Yes — unburned fuel from a misfire enters the cat and can overheat it, causing permanent damage.
How urgent is a coil replacement?: Fix within a week. A flashing check engine light means the cat is actively being damaged.

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