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Why it flashes
A flashing MIL usually warns about severe misfire rather than a minor stored fault.
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Can You Drive With a Flashing Check Engine Light?
Short answer: usually stop driving if possible, because active misfire can damage the catalytic converter quickly.
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Immediate next step
Reduce load, avoid high RPM, and scan codes as soon as practical.
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What to inspect first
Focus on ignition, injector operation, and any signs of mechanical imbalance.